Details of the Researcher

PHOTO

Matsuhiko Nishizawa
Section
Graduate School of Engineering
Job title
Professor
Degree
  • 博士(工学)(東北大学)

  • 工学修士(東北大学)

Research History 10

  • 2020/10 - Present
    東北大学 高等研究機構新領域創成部 FRiD チーム代表(兼任)

  • 2003/04 - Present
    東北大学大学院工学研究科 教授

  • 2018/10 - 2020/03
    AMED 先端計測分析技術・機器開発プログラム チーム代表(兼任)

  • 2017/10 - 2019/03
    JST 未来社会創造事業(MIRAI)チーム代表(兼任)

  • 2008/10 - 2014/03
    JST-CREST

  • 2002/01 - 2003/03
    東北大学大学院工学研究科 助教授

  • 1999/04 - 2001/12
    東北大学大学院工学研究科 講師

  • 1997/04 - 1999/03
    東北大学大学院工学研究科 助手

  • 1995/04 - 1997/03
    大阪大学大学院工学研究科 助手

  • 1994/04 - 1995/03
    学術振興会特別研究員

Show all Show first 5

Education 2

  • Tohoku University Graduate School, Division of Engineering 応用化学

    - 1994/03

  • Tohoku University Faculty of Engineering 応用化学

    - 1989/03

Professional Memberships 6

  • バイオマテリアル学会

  • 表面技術協会

  • ME学会

  • 電気化学会

  • 日本機械学会

  • 日本化学会

︎Show all ︎Show first 5

Research Interests 5

  • iontronics

  • drug delivery

  • medical device

  • bio-battery

  • biosensor

Research Areas 3

  • Life sciences / Biomaterials / Biomaterials Engineering

  • Life sciences / Biomedical engineering / Biomaterials Engineering

  • Nanotechnology/Materials / Basic physical chemistry / Physicochemical Engineering

Awards 5

  1. 文部科学大臣表彰 科学技術賞

    2022/05

  2. 学術賞(日本化学会)

    2017/03/17 日本化学会

  3. 進歩賞・佐野賞(電気化学会)

    2000/04/05 電気化学会

  4. 進歩賞(日本化学会)

    2000/03/29 日本化学会

  5. 論文賞(電気化学会)

    1999/04 電気化学会 High Resolution Cyclic Voltammograms of LiMn2-xNiO4 with a Microelectrode Technique

Papers 260

  1. Mussel-inspired thermo-switchable underwater adhesive based on a Janus hydrogel

    Hiroya Abe, Daichi Yoshihara, Soichiro Tottori, Matsuhiko Nishizawa

    NPG Asia Materials 16 (1) 2024/10/11

    Publisher: Springer Science and Business Media LLC

    DOI: 10.1038/s41427-024-00569-1  

    eISSN: 1884-4057

    More details Close

    Abstract On-demand underwater adhesives with excellent adhesive and gentle detachment properties enable stable connections to various biomedical devices and biointerfaces and avoid the risk of harmful tissue damage upon detachment. Herein, we present a Janus hydrogel adhesive that can reversibly switch its adhesion strength, which is controlled by temperature, using a thermoresponsive polymer and mussel-inspired molecules. This thermoswitchable adhesive (TSA) hydrogel displays both strong adhesion and gentle detachment with an over 1000-fold gap in underwater adhesion strength onto glass, titanium, aluminum, and Teflon substrates when exposed to temperatures above and below the lower critical solution temperature (LCST). The adhesion switch is possibly caused by the change in toughness of the TSA hydrogels with temperature because the Janus hydrogel possesses gradient crosslinked structures. Moreover, the lowermost surface is sufficiently soft to gently detach from the substrate below the LCST. The electrode-integrated hydrogel remains on human skin, and electrical signals are continuous over 10 min above the LCST. In contrast, commercially available hydrogel electrodes quickly swell and detach from the skin. The thermoswitchability of the TSA hydrogel, with its robust adhesion and gentle detachment, offers significant potential for biomedical applications characterized by minimally invasive procedures.

  2. Bilaterally Aligned Electroosmotic Flow Generated by Porous Microneedle Device for Dual‐Mode Delivery Peer-reviewed

    Gaobo Wang, Kosuke Kato, Sae Ichinose, Daisuke Inoue, Airi Kobayashi, Hitoshi Terui, Soichiro Tottori, Makoto Kanzaki, Matsuhiko Nishizawa

    Advanced Healthcare Materials 13 (22) 2024/05/17

    Publisher: Wiley

    DOI: 10.1002/adhm.202401181  

    ISSN: 2192-2640

    eISSN: 2192-2659

    More details Close

    Abstract Here, a novel porous microneedle (PMN) device with bilaterally aligned electroosmotic flow (EOF) enabling controllable dual‐mode delivery of molecules is developed. The PMNs placed at anode and cathode compartments are modified with anionic poly‐2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid and cationic poly‐(3‐acrylamidopropyl) trimethylammonium, respectively. The direction of EOF generated by PMN at the cathode compartment is, therefore, reversed from cathode to anode, countering the unwanted cathodal suctioning of interstitial fluid caused by reverse iontophoresis. With the bilateral alignment of EOF, the versatility of the proposed device is evaluated by delivering molecules with different charges and sizes using Franz cell. In addition, a 3D printed probe device is developed to ease practical handling and minimize electrical stimulation by integrating two PMNs in closed proximity. Finally, the performance of the integrated probe device is demonstrated by dual delivery of a variety of molecules (methylene blue, rhodamine B, and fluorescein isothiocyanate–dextran) using pig skin and vaccination using mice with delivered ovalbumin.

  3. Transdermal drug delivery using a porous microneedle device driven by a hydrogel electroosmotic pump Peer-reviewed

    Gaobo Wang, Kosuke Kato, Izuru Aoki, Sae Ichinose, Daisuke Inoue, Soichiro Tottori, Matsuhiko Nishizawa

    Journal of Materials Chemistry B 12 (6) 1490-1494 2024

    Publisher: Royal Society of Chemistry (RSC)

    DOI: 10.1039/d3tb02208k  

    ISSN: 2050-750X

    eISSN: 2050-7518

    More details Close

    Integrating a hydrogel electroosmotic pump with a parylene C-coated porous microneedle (PMN) is developed for transdermal drug delivery applications.

  4. Spatiotemporally Controllable Chemical Delivery Utilizing Electroosmotic Flow Generated in Combination of Anionic and Cationic Hydrogels Peer-reviewed

    Daigo Terutsuki, Sho Miyazawa, Junya Takagi, Akihiro Yamada, Yunhao Sun, Hiroya Abe, Gaobo Wang, Matsuhiko Nishizawa

    Advanced Functional Materials 2023/09/07

    Publisher: Wiley

    DOI: 10.1002/adfm.202304946  

    ISSN: 1616-301X

    eISSN: 1616-3028

    More details Close

    Abstract Spatiotemporally controlled chemical delivery is crucial for various biomedical engineering applications. Here, a novel concept of electrically controllable delivery utilizing electroosmotic flow (EOF) generated in a combination of anionic and cationic hydrogels (A‐ and C‐hydrogels) is reported. The unique advantages of the A/C‐hydrogel combination are demonstrated utilizing a flexible sheet‐shaped and a thin tubular devices. Since the directions of EOF in the A‐ and C‐hydrogels are opposite to each other, the ionic current for EOF generation flows inside the delivery devices, enabling chemical delivery without accompanying external ionic current that could stimulate target cells and tissues. A thin tubular device, which can be inserted into narrow in vivo structures and be integrated with other flexible devices, exhibits high robustness and repeatability thanks to the flexibility and water retentivity of hydrogels. The EOF devices with A/C‐hydrogels combination show high controllability superior to the pumping with a conventional syringe; the volumetric flow rate is able to be controlled proportionally to the current applied, for example, ≈0.4 µL (mA min)−1 for the tubular device. The developed EOF‐based devices are versatile for delivery of most chemicals regardless of their charge and size, and have great potential for both biomedical researches and therapeutics.

  5. Mussel-inspired interfacial ultrathin films for cellular adhesion on the wrinkled surfaces of hydrophobic fluids Peer-reviewed

    Hiroya Abe, Tomoya Ina, Hirokazu Kaji, Matsuhiko Nishizawa

    Polymer Journal 2023/06/07

    Publisher: Springer Science and Business Media LLC

    DOI: 10.1038/s41428-023-00799-0  

    ISSN: 0032-3896

    eISSN: 1349-0540

  6. Frustoconical porous microneedle for electroosmotic transdermal drug delivery Peer-reviewed

    Daigo Terutsuki, Reiji Segawa, Shinya Kusama, Hiroya Abe, Matsuhiko Nishizawa

    Journal of Controlled Release 354 694-700 2023/02

    Publisher: Elsevier BV

    DOI: 10.1016/j.jconrel.2023.01.055  

    ISSN: 0168-3659

  7. Porous Microneedle-Based Potentiometric Sensor for Intradermal Electrolyte Monitoring Peer-reviewed

    Daigo TERUTSUKI, Shuhei YAMAGUCHI, Yuina ABE, Hiroya ABE, Matsuhiko NISHIZAWA

    Electrochemistry 91 (4) 047007-047007 2023

    Publisher: The Electrochemical Society of Japan

    DOI: 10.5796/electrochemistry.23-00027  

    ISSN: 1344-3542

    eISSN: 2186-2451

  8. Totally Organic Hydrogel‐Based Self‐Closing Cuff Electrode for Vagus Nerve Stimulation Peer-reviewed

    Daigo Terutsuki, Hayato Yoroizuka, Shin‐ichiro Osawa, Yuka Ogihara, Hiroya Abe, Atsuhiro Nakagawa, Masaki Iwasaki, Matsuhiko Nishizawa

    Advanced Healthcare Materials 2201627-2201627 2022/09/23

    Publisher: Wiley

    DOI: 10.1002/adhm.202201627  

    ISSN: 2192-2640

    eISSN: 2192-2659

  9. Intradermal measurement of reactive oxygen species using open-tip porous microneedles Peer-reviewed

    Yuina Abe, Shuhei Yamaguchi, Hiroya Abe, Ryohei Takizawa, Yuki Tatsui, Matsuhiko Nishizawa

    Microelectronic Engineering 265 2022/09/15

    DOI: 10.1016/j.mee.2022.111877  

    ISSN: 0167-9317

  10. Intradermal vaccination via electroosmotic injection from a porous microneedle patch Peer-reviewed

    Hitoshi Terui, Natsumi Kimura, Reiji Segawa, Shinya Kusama, Hiroya Abe, Daigo Terutsuki, Kenshi Yamasaki, Matsuhiko Nishizawa

    Journal of Drug Delivery Science and Technology 103711-103711 2022/08

    Publisher: Elsevier BV

    DOI: 10.1016/j.jddst.2022.103711  

    ISSN: 1773-2247

  11. Water-Proof Anti-Drying Enzymatic O2 Cathode for Bioelectric Skin Patch Peer-reviewed

    Daigo Terutsuki, Kohei Okuyama, Haoyu Zhang, Hiroya Abe, Matsuhiko Nishizawa

    Journal of Power Sources 546 231945 2022/05

    Publisher: Elsevier BV

    DOI: 10.1016/j.jpowsour.2022.231945  

    eISSN: 1556-5068

  12. Tough Mechanically Interlocked Transparent Interface of Hydrogels and Elastomers for Biomedical Applications Peer-reviewed

    Daigo Terutsuki, Ryota Suwabe, Hiroya Abe, Matsuhiko Nishizawa

    Macromolecular Materials and Engineering 307 (7) 2100931-2100931 2022/04/14

    Publisher: Wiley

    DOI: 10.1002/mame.202100931  

    ISSN: 1438-7492

    eISSN: 1439-2054

  13. Porous Microneedle Patch for Electroosmosis‐Promoted Transdermal Delivery of Drugs and Vaccines Peer-reviewed

    Hiroya Abe, Kaito Sato, Natsumi Kimura, Shinya Kusama, Daisuke Inoue, Kenshi Yamasaki, Matsuhiko Nishizawa

    Advanced NanoBiomed Research 2 (1) 2100066-2100066 2022/01

    Publisher: Wiley

    DOI: 10.1002/anbr.202100066  

    ISSN: 2699-9307

    eISSN: 2699-9307

  14. Electrical aspects of skin as a pathway to engineering skin devices Peer-reviewed

    Yuina Abe, Matsuhiko Nishizawa

    APL Bioengineering 2021/12/01

    DOI: 10.1063/5.0064529  

  15. Biodegradable Porous Microneedles for an Electric Skin Patch Peer-reviewed

    Hiroya Abe, Yuuya Matsui, Natsumi Kimura, Matsuhiko Nishizawa

    Macromolecular Materials and Engineering 2100171-2100171 2021/08/05

    Publisher: Wiley

    DOI: 10.1002/mame.202100171  

    ISSN: 1438-7492

    eISSN: 1439-2054

  16. Enzyme electrode for glucose oxidation using low‐solubility 4‐aminodiphenylamine derivatives as electron mediator Peer-reviewed

    Yosuke Masakari, Naoya Totsuka, Yasutomo Shinohara, Shotaro Yoshida, Hiroya Abe, Kotaro Ito, Matsuhiko Nishizawa

    Electrochemical Science Advances 2 (4) 2021/06/26

    Publisher: Wiley

    DOI: 10.1002/elsa.202100036  

    ISSN: 2698-5977

    eISSN: 2698-5977

  17. Porous microneedle-based wearable device for monitoring of transepidermal potential Peer-reviewed

    Yuina Abe, Ryohei Takizawa, Natsumi Kimura, Hajime Konno, Shotaro Yoshida, Matsuhiko Nishizawa

    Biomedical Engineering Advances 1 100004-100004 2021/06

    Publisher: Elsevier BV

    DOI: 10.1016/j.bea.2021.100004  

    ISSN: 2667-0992

  18. Transdermal electroosmotic flow generated by a porous microneedle array patch Peer-reviewed

    Shinya Kusama, Kaito Sato, Yuuya Matsui, Natsumi Kimura, Hiroya Abe, Shotaro Yoshida, Matsuhiko Nishizawa

    Nature Communications 12 (1) 2021/06

    DOI: 10.1038/s41467-021-20948-4  

    ISSN: 2041-1723

    eISSN: 2041-1723

  19. Totally organic electrical skin patch powered by flexible biobattery Peer-reviewed

    Shotaro Yoshida, Hiroya Abe, Yuina Abe, Shinya Kusama, Kenichi Tsukada, Ryo Komatsubara, Matsuhiko Nishizawa

    Journal of Physics: Energy 2 (4) 044004-044004 2020/10/08

    Publisher: IOP Publishing

    DOI: 10.1088/2515-7655/abb873  

    eISSN: 2515-7655

  20. Totally transparent hydrogel-based subdural electrode with patterned salt bridge Peer-reviewed

    Ayaka Nishimura, Ryota Suwabe, Yuka Ogihara, Shotaro Yoshida, Hiroya Abe, Shin-ichiro Osawa, Atsuhiro Nakagawa, Teiji Tominaga, Matsuhiko Nishizawa

    Biomedical Microdevices 22 (3) 2020/09

    Publisher: Springer Science and Business Media LLC

    DOI: 10.1007/s10544-020-00517-0  

    ISSN: 1387-2176

    eISSN: 1572-8781

  21. Hydrogel-based sealed microchamber arrays for rapid medium exchange and drug testing of cell spheroids Peer-reviewed

    Shotaro Yoshida, Kensuke Sumomozawa, Kuniaki Nagamine, Matsuhiko Nishizawa

    Biomedical Microdevices 22 (3) 2020/09

    Publisher: Springer Science and Business Media LLC

    DOI: 10.1007/s10544-020-00505-4  

    ISSN: 1387-2176

    eISSN: 1572-8781

  22. Series-Connected Flexible Biobatteries for Higher-Voltage Electrical Skin Patches Peer-reviewed

    Shotaro Yoshida, Takaya Mizuno, Shinya Kusama, Kaito Sato, Bibek Raut, Matsuhiko Nishizawa

    ACS Applied Electronic Materials 2 (1) 170-176 2020/06

    DOI: 10.1021/acsaelm.9b00671  

  23. Self-Moisturizing Smart Contact Lens Employing Electroosmosis Peer-reviewed

    Shinya Kusama, Kaito Sato, Shotaro Yoshida, Matsuhiko Nishizawa

    Advanced Materials Technologies 5 (1) 1900889 2019/11

    DOI: 10.1002/admt.201900889  

  24. Hydrogel-Based Organic Subdural Electrode with High Conformability to Brain Surface. International-journal Peer-reviewed

    Shuntaro Oribe, Shotaro Yoshida, Shinya Kusama, Shin-Ichiro Osawa, Atsuhiro Nakagawa, Masaki Iwasaki, Teiji Tominaga, Matsuhiko Nishizawa

    Scientific reports 9 (1) 13379-13379 2019/09/16

    DOI: 10.1038/s41598-019-49772-z  

    More details Close

    A totally soft organic subdural electrode has been developed by embedding an array of poly(3,4-ethylenedioxythiophene)-modified carbon fabric (PEDOT-CF) into the polyvinyl alcohol (PVA) hydrogel substrate. The mesh structure of the stretchable PEDOT-CF allowed stable structural integration with the PVA substrate. The electrode performance for monitoring electrocorticography (ECoG) was evaluated in saline solution, on ex vivo brains, and in vivo animal experiments using rats and porcines. It was demonstrated that the large double-layer capacitance of the PEDOT-CF brings low impedance at the frequency of brain wave including epileptic seizures, and PVA hydrogel substrate minimized the contact impedance on the brain. The most important unique feature of the hydrogel-based ECoG electrode was its shape conformability to enable tight adhesion even to curved, grooved surface of brains by just being placed. In addition, since the hydrogel-based electrode is totally organic, the simultaneous ECoG-fMRI measurements could be conducted without image artifacts, avoiding problems induced by conventional metallic electrodes.

  25. Highly Efficient, Flexible Wireless-Powered Circuit Printed on a Moist, Soft Contact Lens Peer-reviewed

    Taiki Takamatsu, Yunhan Chen, Toshihiko Yoshimasu, Matsuhiko Nishizawa, Takeo Miyake

    ADVANCED MATERIALS TECHNOLOGIES 4 (5) 1800671-1-1800671-8 2019/05

    DOI: 10.1002/admt.201800671  

    ISSN: 2365-709X

  26. Engineered 3d electroosmotic microchannels for rapid and mass transportation of body fluids in wearable devices

    Shinya Kusama, Kaito Sato, Yuya Matsui, Shotaro Yoshida, Matsuhiko Nishizawa

    23rd International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2019 1204-1205 2019

    Publisher: Chemical and Biological Microsystems Society

  27. Organic transdermal iontophoresis patch powered by serialized layer-built biofuel cells

    Takaya Mizuno, Kaito Sato, Shinya Kusama, Shotaro Yoshida, Matsuhiko Nishizawa

    23rd International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2019 199-200 2019

    Publisher: Chemical and Biological Microsystems Society

  28. Hydrogel-based sealed microchambers for simple and cost-effective cell culture and drug testing

    Shotaro Yoshida, Kensuke Sumomozawa, Matsuhiko Nishizawa

    23rd International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2019 1504-1505 2019

    Publisher: Chemical and Biological Microsystems Society

  29. Transscleral Sustained Ranibizumab Delivery using an Episcleral Implantable Device: Suppression of Laser-Induced Choroidal Neovascularization in Rats International-journal Peer-reviewed

    Nobuhiro Nagai, Nezhad K Zhaleh, Reiko Daigaku, Saaya Saijo, Yuanhui Song, Keiko Terata, Ayako Hoshi, Matsuhiko Nishizawa, Toru Nakazawa, Hirokazu Kaji, Toshiaki Abe

    International Journal of Pharmaceutics 567 118458-118458 2019

    DOI: 10.1016/j.ijpharm.2019.118458  

    More details Close

    Successful treatment of age-related macular diseases requires an effective controlled drug release system with less invasive route of administration in the eye to reduce the burden of frequent intravitreal injections for patients. In this study, we developed an episcleral implantable device for sustained release of ranibizumab, and evaluated its efficacy on suppression of laser-induced choroidal neovascularization (CNV) in rats. We tested both biodegradable and non-biodegradable sheet-type devices consisting of crosslinked gelatin/chitosan (Gel/CS) and photopolymerized poly(ethyleneglycol) dimethacrylate that incorporated collagen microparticles (PEGDM/COL). In vitro release studies of FITC-labeled albumin showed a constant release from PEGDM/COL sheets compared to Gel/CS sheets. The Gel/CS sheets gradually biodegraded in the sclera during the 24-week implantation; however, the PEGDM/COL sheets did not degrade. FITC-albumin was detected in the retina during 18 weeks implantation in the PEGDM/COL sheet-treated group, and was detected in the Gel/CS sheet-treated group during 6 weeks implantation. CNV was suppressed 18 weeks after application of ranibizumab-loaded PEGDM/COL sheets compared to a placebo PEGDM/COL sheet-treated group, and to the intravitreal ranibizumab-injected group. In conclusion, the PEGDM/COL sheet device suppressed CNV via a transscleral administration route for 18 weeks, indicating that prolonged sustained ranibizumab release could reduce the burden of repeated intravitreal injections.

  30. Red Light-Promoted Skin Barrier Recovery: Spatiotemporal Evaluation by Transepidermal Potential Peer-reviewed

    Yuina Abe, Hajime Konno, Shotaro Yoshida, Takeshi Yamauchi, Kenshi Yamasaki, Mitsuhiro Denda, Matsuhiko Nishizawa

    PLoS ONE 14 e0219198 2019

  31. Hydrogel Microchambers Integrated with Organic Electrodes for Efficient Electrical Stimulation of Human iPSC-derived Cardiomyocytes Peer-reviewed

    Shotaro Yoshida, Kensuke Sumomozawa, Kuniaki Nagamine, Matsuhiko Nishizawa

    Macromolecular Bioscience 19 (6) 1900060-1-1900060-9 2019

    DOI: 10.1002/mabi.201900060  

    ISSN: 1616-5187

    eISSN: 1616-5195

  32. Transepidermal Potential of the Stretched Skin Peer-reviewed

    Yuina Abe, Hajime Konno, Shotaro Yoshida, Matsuhiko Nishizawa

    Journal of Biomechanical Engineering 141 084503-1-084503-4 2019

  33. Organic Electrochromic Timer for Enzymatic Skin Patches Peer-reviewed

    Hiroyuki Kai, Wataru Suda, Shotaro Yoshida, Matsuhiko Nishizawa

    Biosensor and Bioelectronic 123 108-113 2019

    DOI: 10.1016/j.bios.2018.07.013  

    ISSN: 0956-5663

    eISSN: 1873-4235

  34. In situ formation of injectable chitosan-gelatin hydrogels through double crosslinking for sustained intraocular drug delivery Peer-reviewed

    Yuanhui Song, Nobuhiro Nagai, Saaya Saijo, Hirokazu Kaji, Matsuhiko Nishizawa, Toshiaki Abe

    Materials Science and Engineering C 88 1-12 2018/07/01

    Publisher: Elsevier Ltd

    DOI: 10.1016/j.msec.2018.02.022  

    ISSN: 0928-4931

  35. Soft, Wet and Ionic Microelectrode Systems Invited Peer-reviewed

    Matsuhiko Nishizawa

    Bull. Chem. Soc. Jpn 91 1141-1149 2018/07

  36. A Self-Powered Supply-Sensing Biosensor Platform Using Bio Fuel Cell and Low-Voltage, Low-Cost CMOS Supply-Controlled Ring Oscillator with Inductive-Coupling Transmitter for Healthcare IoT Peer-reviewed

    Kiichi Niitsu, Atsuki Kobayashi, Yuya Nishio, Kenya Hayashi, Kei Ikeda, Takashi Ando, Yudai Ogawa, Hiroyuki Kai, Matsuhiko Nishizawa, Kazuo Nakazato

    IEEE Transactions on Circuits and Systems I 65 (9) 2784-2796 2018/06

    DOI: 10.1109/TCSI.2018.2791516  

    ISSN: 1549-8328

    eISSN: 1558-0806

  37. Contractile Skeletal Muscle Cells Cultured with a Conducting Soft Wire for Effective, Selective Stimulation Peer-reviewed

    Kuniaki Nagamine, Hirotaka Sato, Hiroyuki Kai, Hirokazu Kaji, Makoto Kanzaki, Matsuhiko Nishizawa

    Scientific Reports 8 2253 2018/03

  38. Pharmacokinetic and Safety Evaluation of a Transscleral Sustained Unoprostone Release Device in Monkey Eyes. International-journal Peer-reviewed

    Nagai N, Yamada S, Kawasaki J, Koyanagi E, Saijo S, Kaji H, Nishizawa M, Nakazawa T, Abe T

    Investigative ophthalmology & visual science 59 (2) 644-652 2018/02

    DOI: 10.1167/iovs.17-22429  

    ISSN: 0146-0404

    More details Close

    Purpose: We evaluate the ocular tissue distribution and retinal toxicity of unoprostone (UNO) during 12 months, after transscleral sustained-UNO administration using a drug delivery device in monkey eyes. Methods: The device consisted of a reservoir, controlled-release cover, and a drug formulation of photopolymerized polyethylene glycol dimethacrylate. Six mg UNO was loaded into the device (length, 17 mm; width, 4.4 mm; height, 1 mm). The concentrations of M1, a primary metabolite of UNO, in the retina, choroid, vitreous, lens, aqueous humor, iris, ciliary body, and plasma were determined by liquid chromatography-tandem mass spectrometry at 3, 6, and 12 months after implantation. Retinal toxicity was evaluated by electroretinography (ERG), optical coherence tomography (OCT), and IOP at preimplantation, and at 6, 9, and 12 months after implantation. Focal ERGs were performed at 9 and 12 months after implantation. Results: M1 was detected in the choroid and retina with maximum peaks of 243.2 and 8.41 ng/g at 6 months, respectively. M1 in the ciliary body and iris was detected with maximum peaks of 7.66 and 10.4 ng/g at 6 and 12 months, respectively. Less than 1 ng/mL or ng/g of M1 was detected in the aqueous humor, vitreous, and lens. No changes were observed in retinal function as assessed by ERG, IOP, or macula thickness and retinal histology by OCT examinations during the 12-month period. No differences in focal ERG amplitudes, especially in the macula, were observed. Conclusions: The device provided intraocular sustained delivery of UNO for 12 months without producing severe retinal toxicity.

  39. A self-deploying drug release device using polymeric films Peer-reviewed

    Taro Kondo, Zhaleh Kashkouli Nezhad, Jin Suzuki, Nobuhiro Nagai, Matsuhiko Nishizawa, Toshiaki Abe, Hirokazu Kaji

    Journal of Biomedical Materials Research - Part B Applied Biomaterials 106 (2) 780-786 2018/02/01

    Publisher: John Wiley and Sons Inc.

    DOI: 10.1002/jbm.b.33887  

    ISSN: 1552-4981 1552-4973

  40. Fluid-Permeable Enzymatic Lactate Sensors for Micro-Volume Specimen Peer-reviewed

    Hiroyuki Kai, Yuto Kato, Ryoma Toyosato, Matsuhiko Nishizawa

    Analyst 143 (22) 5545-5551 2018

    DOI: 10.1039/c8an00979a  

    ISSN: 0003-2654

    eISSN: 1364-5528

  41. Space-filling open microfluidic channels designed to collect water droplets Peer-reviewed

    Hiroyuki Kai, Ryoma Toyosato, Matsuhiko Nishizawa

    RSC Advances 8 (29) 15985-15990 2018

    Publisher: Royal Society of Chemistry

    DOI: 10.1039/c8ra02655f  

    ISSN: 2046-2069

    eISSN: 2046-2069

  42. Design and Experimental Verification of a 0.19 v 53 μw 65 nm CMOS Integrated Supply-Sensing Sensor with a Supply-Insensitive Temperature Sensor and an Inductive-Coupling Transmitter for a Self-Powered Bio-sensing System Using a Biofuel Cell Peer-reviewed

    Atsuki Kobayashi, Kei Ikeda, Yudai Ogawa, Hiroyuki Kai, Matsuhiko Nishizawa, Kazuo Nakazato, Kiichi Niitsu

    IEEE Transactions on Biomedical Circuits and Systems 11 (6) 1313-1323 2017/12/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/TBCAS.2017.2735447  

    ISSN: 1932-4545

  43. Controlled basic fibroblast growth factor release device made of poly(ethyleneglycol) dimethacrylates for creating a subcutaneous neovascular bed for cell transplantation Peer-reviewed

    Shinji Yamada, Nobuhiro Nagai, Saaya Saijo, Hirokazu Kaji, Matsuhiko Nishizawa, Kozue Imura, Masafumi Goto, Toshiaki Abe

    JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A 105 (11) 3017-3024 2017/11

    DOI: 10.1002/jbm.a.36153  

    ISSN: 1549-3296

    eISSN: 1552-4965

  44. Accelerated Wound Healing on Skin by Electrical Stimulation with a Bioelectric Plaster Peer-reviewed

    Hiroyuki Kai, Takeshi Yamauchi, Yudai Ogawa, Ayaka Tsubota, Takahiro Magome, Takeo Miyake, Kenshi Yamasaki, Matsuhiko Nishizawa

    ADVANCED HEALTHCARE MATERIALS 6 (22) 1700465-1700470 2017/11

    DOI: 10.1002/adhm.201700465  

    ISSN: 2192-2640

    eISSN: 2192-2659

  45. Physicochemical and biological characterization of sustained isopropyl unoprostone-release device made of poly(ethyleneglycol) dimethacrylates Peer-reviewed

    Nobuhiro Nagai, Yasuko Izumida, Yoshimasa Yamazaki, Hirokazu Kaji, Junichi Kawasaki, Matsuhiko Nishizawa, Toshiaki Abe

    JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE 28 (7) 2017/07

    DOI: 10.1007/s10856-017-5919-2  

    ISSN: 0957-4530

    eISSN: 1573-4838

  46. Enzyme/Carbon Nanotube Aqueous Mixture for Single-Step Printing of Enzyme Electrodes Peer-reviewed

    Hiroyuki Kai, Yudai Ogawa, Hsieh Yun Chen, Kenji Hata, Matsuhiko Nishizawa

    Austin Journal of Biosensors & Bioelectronics 3 1-5 2017/06

  47. An Array of Porous Microneedles for Transdermal Monitoring of Intercellular Swelling Peer-reviewed

    Kuniaki Nagamine, Jun Kubota, Hiroyuki Kai, Yoshinobu Ono, Matsuhiko Nishizawa

    Biomedical Microdevices 19 68-74 2017/06

  48. Microfluidic co-cultures of retinal pigment epithelial cells and vascular endothelial cells to investigate choroidal angiogenesis Peer-reviewed

    Li-Jiun Chen, Shuntaro Ito, Hiroyuki Kai, Kuniaki Nagamine, Nobuhiro Nagai, Matsuhiko Nishizawa, Toshiaki Abe, Hirokazu Kaji

    SCIENTIFIC REPORTS 7 3538 2017/06

    DOI: 10.1038/s41598-017-03788-5  

    ISSN: 2045-2322

  49. Intrinsically Stretchable Electrochromic Display by a Composite Film of Poly(3,4-ethylenedioxythiophene) and Polyurethane Peer-reviewed

    Hiroyuki Kai, Wataru Suda, Yudai Ogawa, Kuniaki Nagamine, Matsuhiko Nishizawa

    ACS APPLIED MATERIALS & INTERFACES 9 (23) 19513-19518 2017/06

    DOI: 10.1021/acsami.7b03124  

    ISSN: 1944-8244

    eISSN: 1944-8252

  50. Electrochemical manipulation of cell populations supported by biodegradable polymeric nanosheets for cell transplantation therapy Peer-reviewed

    Jin Suzuki, Nobuhiro Nagai, Matsuhiko Nishizawa, Toshiaki Abe, Hirokazu Kaji

    BIOMATERIALS SCIENCE 5 (2) 216-222 2017/02

    DOI: 10.1039/c6bm00852f  

    ISSN: 2047-4830

    eISSN: 2047-4849

  51. Design of an Energy-Autonomous Bio-Sensing System Using a Biofuel Cell and 0.19V 53 mu W Integrated Supply-Sensing Sensor with a Supply-Insensitive Temperature Sensor and Inductive-Coupling Transmitter Peer-reviewed

    Atsuki Kobayashi, Kei Ikeda, Yudai Ogawa, Matsuhiko Nishizawa, Kazuo Nakazato, Kiichi Niitsu

    2017 22ND ASIA AND SOUTH PACIFIC DESIGN AUTOMATION CONFERENCE (ASP-DAC) 25-26 2017

    ISSN: 2153-6961

  52. Long-Term Protection of Genetically Ablated Rabbit Retinal Degeneration by Sustained Transscleral Unoprostone Delivery. International-journal Peer-reviewed

    Nagai N, Koyanagi E, Izumida Y, Liu J, Katsuyama A, Kaji H, Nishizawa M, Osumi N, Kondo M, Terasaki H, Mashima Y, Nakazawa T, Abe T

    Investigative ophthalmology & visual science 57 (15) 6527-6538 2016/12

    DOI: 10.1167/iovs.16-20453  

    ISSN: 0146-0404

  53. Totally shape-conformable electrode/hydrogel composite for on-skin electrophysiological measurements Peer-reviewed

    Kuniaki Nagamine, Shun Chihara, Hiroyuki Kai, Hirokazu Kaji, Matsuhiko Nishizawa

    SENSORS AND ACTUATORS B-CHEMICAL 237 49-53 2016/12

    DOI: 10.1016/j.snb.2016.06.076  

    ISSN: 0925-4005

  54. Stretchable patches and devices toward electronics on the skin

    Hiroyuki Kai, Kuniaki Nagamine, Matsuhiko Nishizawa

    16th International Conference on Nanotechnology - IEEE NANO 2016 917-920 2016/11/21

    DOI: 10.1109/NANO.2016.7751571  

  55. Protective effects of sustained transscleral unoprostone delivery against retinal degeneration in S334ter rhodopsin mutant rats Peer-reviewed

    Nobuhiro Nagai, Satoru Iwata, Hirokazu Kaji, Kaori Sampei, Yuki Katsukura, Hideyuki Onami, Matsuhiko Nishizawa, Toru Nakazawa, Yukihiko Mashima, Toshiaki Abe

    JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS 104 (8) 1730-1737 2016/11

    DOI: 10.1002/jbm.b.33522  

    ISSN: 1552-4973

    eISSN: 1552-4981

  56. Minimally-invasive transepidermal potentiometry with microneedle salt bridge Peer-reviewed

    Yuina Abe, Kuniaki Nagamine, Mayu Nakabayashi, Hiroyuki Kai, Hirokazu Kaji, Takeshi Yamauchi, Kenshi Yamasaki, Matsuhiko Nishizawa

    BIOMEDICAL MICRODEVICES 18 (4) 1-6 2016/08

    DOI: 10.1007/s10544-016-0080-0  

    ISSN: 1387-2176

    eISSN: 1572-8781

  57. Organic skin patch with built-in enzymatic battery Peer-reviewed

    Matsuhiko Nishizawa, Kuniaki Nagamine, Hiroyuki Kai

    Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS) 2016-February 505-508 2016/02/26

    DOI: 10.1109/MEMSYS.2016.7421672  

    ISSN: 1084-6999

  58. Design of an Energy-Autonomous, Disposable, Supply-Sensing Biosensor Using Bio Fuel Cell and 0.23-V 0.25-mu m Zero-Vth All-Digital CMOS Supply-Controlled Ring Oscillator with Inductive Transmitter Peer-reviewed

    Kiichi Niitsu, Atsuki Kobayashi, Yudai Ogawa, Matsuhiko Nishizawa, Kazuo Nakazato

    2016 21ST ASIA AND SOUTH PACIFIC DESIGN AUTOMATION CONFERENCE (ASP-DAC) 23-24 2016

    ISSN: 2153-6961

  59. Injectable Polymeric Nanosheets for Subretinal Cell Delivery Peer-reviewed

    Hirokazu Kaji, Jin Suzuki, Matsuhiko Nishizawa, Nobuhiro Nagai, Toshiaki Abe

    2016 IEEE 16TH INTERNATIONAL CONFERENCE ON NANOTECHNOLOGY (IEEE-NANO) 267-269 2016

  60. An Energy-Autonomous Bio-Sensing System Using a Biofuel Cell and 0.19V 53 mu W 65nm-CMOS Integrated Supply-Sensing Sensor with a Supply-Insensitive Temperature Sensor and Inductive-Coupling Transmitter Peer-reviewed

    Atsuki Kobayashi, Kei Ikeda, Yudai Ogawa, Matsuhiko Nishizawa, Kazuo Nakazato, Kiichi Niitsu

    PROCEEDINGS OF 2016 IEEE BIOMEDICAL CIRCUITS AND SYSTEMS CONFERENCE (BIOCAS) 148-151 2016

    ISSN: 2163-4025

  61. Hydrogel-based electrical stimulation culture system to control the engineered cellular activities driven by nano biomolecules Peer-reviewed

    Nagamine K, Sato H, Kai H, Kaji H, Nishizawa M

    16th International Conference on Nanotechnology - IEEE NANO 2016 232-233 2016

    DOI: 10.1109/NANO.2016.7751448  

  62. Transscleral Controlled Delivery of Geranylgeranylaceton Using a Polymeric Device Protects Rat Retina Against Light Injury Peer-reviewed

    Nobuhiro Nagai, Hirokazu Kaji, Matsuhiko Nishizawa, Toru Nakazawa, Toshiaki Abe

    RETINAL DEGENERATIVE DISEASES: MECHANISMS AND EXPERIMENTAL THERAPY 854 471-477 2016

    DOI: 10.1007/978-3-319-17121-0_63  

    ISSN: 0065-2598

  63. Porous polymer microneedles with interconnecting microchannels for rapid fluid transport Peer-reviewed

    Liming Liu, Hiroyuki Kai, Kuniaki Nagamine, Yudai Ogawa, Matsuhiko Nishizawa

    RSC ADVANCES 6 (54) 48630-48635 2016

    DOI: 10.1039/c6ra07882f  

    ISSN: 2046-2069

    eISSN: 2046-2069

  64. Stretchable biofuel cell with enzyme-modified conductive textiles Peer-reviewed

    Yudai Ogawa, Yuki Takai, Yuto Kato, Hiroyuki Kai, Takeo Miyake, Matsuhiko Nishizawa

    BIOSENSORS & BIOELECTRONICS 74 947-952 2015/12

    DOI: 10.1016/j.bios.2015.07.063  

    ISSN: 0956-5663

    eISSN: 1873-4235

  65. Application of clotrimazole via a novel controlled release device provides potent retinal protection Peer-reviewed

    Zhaleh Kashkouli Nezhad, Nobuhiro Nagai, Kotaro Yamamoto, Hirokazu Kaji, Matsuhiko Nishizawa, Hideyuki Saya, Toru Nakazawa, Toshiaki Abe

    JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE 26 (9) 230-237 2015/09

    DOI: 10.1007/s10856-015-5561-9  

    ISSN: 0957-4530

    eISSN: 1573-4838

  66. Portable Micropatterns of Neuronal Cells Supported by Thin Hydrogel Films Peer-reviewed

    Kuniaki Nagamine, Takuya Hirata, Kohei Okamoto, Yuina Abe, Hirokazu Kaji, Matsuhiko Nishizawa

    ACS BIOMATERIALS SCIENCE & ENGINEERING 1 (5) 329-334 2015/05

    DOI: 10.1021/acsbiomaterials.5b00020  

    ISSN: 2373-9878

  67. Organic Transdermal Iontophoresis Patch with Built-in Biofuel Cell Peer-reviewed

    Yudai Ogawa, Koichiro Kato, Takeo Miyake, Kuniaki Nagamine, Takuya Ofuji, Syuhei Yoshino, Matsuhiko Nishizawa

    ADVANCED HEALTHCARE MATERIALS 4 (4) 506-510 2015/03

    DOI: 10.1002/adhm.201400457  

    ISSN: 2192-2640

    eISSN: 2192-2659

  68. Hydrogel-based portable electrical stimulation culture film for skeletal muscle cells Peer-reviewed

    Nagamine K, Hirata T, Kaji H, Kanzaki M, Nishizawa M

    MicroTAS 2015 - 19th International Conference on Miniaturized Systems for Chemistry and Life Sciences 627-629 2015

  69. Bioactivity Monitoring Using Conductive Polymer Based Silk Electrode

    SONOBE TATSUMA, TAKIZAWA YUSUKE, WATANABE SATOSHI, NISHIZAWA MATSUHIKO, TORIMITSU KEIICHI

    Transactions of Japanese Society for Medical and Biological Engineering 53 (Supplement) S259_01-S259_01 2015

    Publisher: Japanese Society for Medical and Biological Engineering

    DOI: 10.11239/jsmbe.53.s259_01  

    ISSN: 1347-443X

    eISSN: 1881-4379

    More details Close

    Recently, metal electrode, such as Ag/AgCl electrode, is used for measuring the bioactivity, which is electrocardiogram and muscle potential. However, there are some problems to use the metal electrode for living body. Tissue inflammation is one of the problems in vivo, discomfort and irritation to the skin are those in vitro. Then, silk electrode, which pristine silk is coated with conductive polymer, has the possibility of solving these problems, because of its high biocompatibility and flexibility. Using silk electrode, Therefore, we could measure the muscle intercellular potential and extracellular potential to observe the bioactivity.

  70. An Energy-Autonomous, Disposable, Big-Data-Based Supply-Sensing Biosensor Using Bio Fuel Cell and 0.23-V 0.25-mu m Zero-V-th All-Digital CMOS Supply-Controlled Ring Oscillator with Inductive Transmitter Peer-reviewed

    Kiichi Niitsu, Atsuki Kobayashi, Yudai Ogawa, Matsuhiko Nishizawa, Kazuo Nakazato

    2015 IEEE BIOMEDICAL CIRCUITS AND SYSTEMS CONFERENCE (BIOCAS) 596-599 2015

    ISSN: 2163-4025

  71. Highly stretchable cell-cultured hydrogel sheet Peer-reviewed

    Kuniaki Nagamine, Yuina Abe, Hiroyuki Kai, Hirokazu Kaji, Matsuhiko Nishizawa

    RSC ADVANCES 5 (81) 66334-66338 2015

    DOI: 10.1039/c5ra11059a  

    ISSN: 2046-2069

  72. Stretchable, transparent and molecular permeable honeycomb electrodes and their hydrogel hybrids prepared by the breath figure method and sputtering of metals Peer-reviewed

    Hiroshi Yabu, Kuniaki Nagamine, Jun Kamei, Yuta Saito, Taiki Okabe, Tatsuaki Shimazaki, Matsuhiko Nishizawa

    RSC ADVANCES 5 (107) 88414-88418 2015

    DOI: 10.1039/c5ra18063e  

    ISSN: 2046-2069

  73. Highly Conductive Stretchable and Biocompatible Electrode-Hydrogel Hybrids for Advanced Tissue Engineering Peer-reviewed

    Masato Sasaki, Bijoy Chandapillai Karikkineth, Kuniaki Nagamine, Hirokazu Kaji, Keiichi Torimitsu, Matsuhiko Nishizawa

    ADVANCED HEALTHCARE MATERIALS 3 (11) 1919-1927 2014/11

    DOI: 10.1002/adhm.201400209  

    ISSN: 2192-2640

    eISSN: 2192-2659

  74. A Platform for Controlled Dual-Drug Delivery to the Retina: Protective Effects against Light-Induced Retinal Damage in Rats Peer-reviewed

    Nobuhiro Nagai, Hirokazu Kaji, Hideyuki Onami, Yuki Katsukura, Yumi Ishikawa, Zhaleh Kashkouli Nezhad, Kaori Sampei, Satoru Iwata, Shuntaro Ito, Matsuhiko Nishizawa, Toru Nakazawa, Noriko Osumi, Yukihiko Mashima, Toshiaki Abe

    ADVANCED HEALTHCARE MATERIALS 3 (10) 1555-1560 2014/10

    DOI: 10.1002/adhm.201400114  

    ISSN: 2192-2640

    eISSN: 2192-2659

  75. Cell delivery using micropatterned ultra-thin polymeric films Peer-reviewed

    Yoshihiro Mori, Toshinori Fujie, Nobuhiro Nagai, Matsuhiko Nishizawa, Ali Khademhosseini, Toshiaki Abe, Hirokazu Kaji

    Transactions of Japanese Society for Medical and Biological Engineering 52 192-O-193 2014/08/17

    Publisher: Japan Soc. of Med. Electronics and Biol. Engineering

    DOI: 10.11239/jsmbe.52.O-192  

    ISSN: 1347-443X 1881-4379

  76. Bonding of synthetic hydrogels with fibrin as the glue to engineer hydrogel-based biodevices Peer-reviewed

    Kuniaki Nagamine, Kohei Okamoto, Hirokazu Kaji, Matsuhiko Nishizawa

    JOURNAL OF BIOSCIENCE AND BIOENGINEERING 118 (1) 94-97 2014/07

    DOI: 10.1016/j.jbiosc.2013.12.024  

    ISSN: 1389-1723

    eISSN: 1347-4421

  77. Miniature Enzymatic Fuel Cells Peer-reviewed

    Takeo Miyake, Matsuhiko Nishizawa

    Enzymatic Fuel Cells: From Fundamentals to Applications 361-373 2014/05/27

    Publisher: Wiley Blackwell

    DOI: 10.1002/9781118869796.ch17  

  78. Electroporation of Adherent Cells by Direct Lamination of Hydrogel-based Microelectrode Substrates Peer-reviewed

    Daisuke Takahashi, Masato Sasaki, Kuniaki Nagamine, Keiichi Torimitsu, Matsuhiko Nishizawa

    CHEMISTRY LETTERS 43 (4) 444-446 2014/04

    DOI: 10.1246/cl.131083  

    ISSN: 0366-7022

    eISSN: 1348-0715

  79. Micropatterned Polymeric Nanosheets for Local Delivery of an Engineered Epithelial Monolayer Peer-reviewed

    Toshinori Fujie, Yoshihiro Mori, Shuntaro Ito, Matsuhiko Nishizawa, Hojae Bae, Nobuhiro Nagai, Hideyuki Onami, Toshiaki Abe, Ali Khademhosseini, Hirokazu Kaji

    ADVANCED MATERIALS 26 (11) 1699-1705 2014/03

    DOI: 10.1002/adma.201304183  

    ISSN: 0935-9648

    eISSN: 1521-4095

  80. A polymeric device for controlled transscleral multi-drug delivery to the posterior segment of the eye Peer-reviewed

    Nobuhiro Nagai, Hirokazu Kaji, Hideyuki Onami, Yumi Ishikawa, Matsuhiko Nishizawa, Noriko Osumi, Toru Nakazawa, Toshiaki Abe

    ACTA BIOMATERIALIA 10 (2) 680-687 2014/02

    DOI: 10.1016/j.actbio.2013.11.004  

    ISSN: 1742-7061

    eISSN: 1878-7568

  81. Hydrogel film with skeletal muscle cell micropatterns to develop the soft fluidic tube of the perfusion culture system Peer-reviewed

    Nagamine K, Okamoto K, Hirata T, Kaji H, Kanzaki M, Nishizawa M

    18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014 518-520 2014

  82. Characterization of retinal pigment epithelial cells and endothelial cells within a microfluidic device towards a retina on a chip Peer-reviewed

    Kaji H, Ito S, Nagamine K, Nishizawa M, Nagai N, Abe T

    18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014 742-744 2014

  83. Intrascleral Transplantation of a Collagen Sheet with Cultured Brain-Derived Neurotrophic Factor Expressing Cells Partially Rescues the Retina from Damage due to Acute High Intraocular Pressure Peer-reviewed

    Toshiaki Abe, Yumi Tokita-Ishikawa, Hideyuki Onami, Yuki Katsukura, Hirokazu Kaji, Matsuhiko Nishizawa, Nobuhiro Nagai

    RETINAL DEGENERATIVE DISEASES: MECHANISMS AND EXPERIMENTAL THERAPY 801 837-843 2014

    DOI: 10.1007/978-1-4614-3209-8_105  

    ISSN: 0065-2598

  84. Controlled Transscleral Dual-drug Delivery by a Polymeric Device Reduces Light-induced Retinal Damage Peer-reviewed

    Nagai N, Kaji H, Zhaleh K. N, Sampei K, Iwata S, Nishizawa M, Mashima Y, Abe T

    Investigative Ophthalmology & Visual Science 55 (13) 446 2014

  85. Hydrogel-based bioassay sheets for in vitro evaluation of contraction-dependent metabolic regulation in skeletal muscle cells Peer-reviewed

    Kuniaki Nagamine, Kohei Okamoto, Shingo Otani, Hirokazu Kaji, Makoto Kanzaki, Matsuhiko Nishizawa

    BIOMATERIALS SCIENCE 2 (2) 252-256 2014

    DOI: 10.1039/c3bm60179j  

    ISSN: 2047-4830

    eISSN: 2047-4849

  86. Surfactant-assisted direct electron transfer between multi-copper oxidases and carbon nanotube-based porous electrodes Peer-reviewed

    Yudai Ogawa, Syuhei Yoshino, Takeo Miyake, Matsuhiko Nishizawa

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS 16 (26) 13059-13062 2014

    DOI: 10.1039/c4cp00872c  

    ISSN: 1463-9076

    eISSN: 1463-9084

  87. Transscleral Sustained Vasohibin-1 Delivery by a Novel Device Suppressed Experimentally-Induced Choroidal Neovascularization Peer-reviewed

    Hideyuki Onami, Nobuhiro Nagai, Hirokazu Kaji, Matsuhiko Nishizawa, Yasufumi Sato, Noriko Osumi, Toru Nakazawa, Toshiaki Abe

    PLoS ONE 8 (3) e58580 2013/03/05

    DOI: 10.1371/journal.pone.0058580  

    ISSN: 1932-6203

  88. Flexible, layered biofuel cells Peer-reviewed

    Takeo Miyake, Keigo Haneda, Syuhei Yoshino, Matsuhiko Nishizawa

    BIOSENSORS & BIOELECTRONICS 40 (1) 45-49 2013/02

    DOI: 10.1016/j.bios.2012.05.041  

    ISSN: 0956-5663

    eISSN: 1873-4235

  89. 導電性高分子電極のプロセシングとバイオ応用

    西澤 松彦

    電気化学および工業物理化学 : denki kagaku 81 (1) 31-35 2013/01/05

    Publisher: The Electrochemical Society of Japan

    DOI: 10.5796/electrochemistry.81.31  

    ISSN: 1344-3542

  90. Self-powered sugar indicator using CNT-enzyme ensemble film Peer-reviewed

    Y. Ogawa, S. Yoshino, K. Kato, T. Magome, T. Yamada, T. Miyake, K. Hata, M. Nishizawa

    Journal of Physics: Conference Series 476 (1) 2013

    Publisher: Institute of Physics Publishing

    DOI: 10.1088/1742-6596/476/1/012028  

    ISSN: 1742-6596 1742-6588

  91. Hydrogel-based imaging sensor for the assay of exercise-dependent metabolic regulation in skeletal muscle cells Peer-reviewed

    Nagamine K, Okamoto K, Kaji H, Kanzaki M, Nishizawa M

    17th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2013 3 1505-1507 2013

  92. Hydrogel-Based Contractile Electrodes for Stimulation of Cells and Tissues Peer-reviewed

    Matsuhiko Nishizawa

    2013 35TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY (EMBC) 2821-2824 2013

    ISSN: 1557-170X

  93. Molecularly Ordered Bioelectrocatalytic Composite Inside a Film of Aligned Carbon Nanotubes Peer-reviewed

    Syuhei Yoshino, Takeo Miyake, Takeo Yamada, Kenji Hata, Matsuhiko Nishizawa

    ADVANCED ENERGY MATERIALS 3 (1) 60-64 2013/01

    DOI: 10.1002/aenm.201200422  

    ISSN: 1614-6832

    eISSN: 1614-6840

  94. Sheet-shaped biofuel cell constructed from enzyme-modified nanoengineered carbon fabric Peer-reviewed

    Keigo Haneda, Syuhei Yoshino, Takuya Ofuji, Takeo Miyake, Matsuhiko Nishizawa

    ELECTROCHIMICA ACTA 82 175-178 2012/11

    DOI: 10.1016/j.electacta.2012.01.112  

    ISSN: 0013-4686

    eISSN: 1873-3859

  95. Impedance Sensing of Biological Processes in Mammalian Cells Peer-reviewed

    Lamya Ghenim, Hirokazu Kaji, Matsuhiko Nishizawa, Xavier Gidrol

    Integrated Biomaterials for Biomedical Technology 293-308 2012/08/17

    Publisher: John Wiley and Sons

    DOI: 10.1002/9781118482513.ch8  

  96. An Oxygen Responsive Microparticle-Patterned Hydrogel Sheet for Enzyme Activity Imaging Peer-reviewed

    Kuniaki Nagamine, Shuntaro Ito, Mai Takeda, Shingo Otani, Matsuhiko Nishizawa

    ELECTROCHEMISTRY 80 (5) 318-320 2012/05

    DOI: 10.5796/electrochemistry.80.318  

    ISSN: 1344-3542

    eISSN: 2186-2451

  97. Conducting Polymer Microelectrodes Anchored to Hydrogel Films Peer-reviewed

    Yuichiro Ido, Daisuke Takahashi, Masato Sasaki, Kuniaki Nagamine, Takeo Miyake, Piotr Jasinski, Matsuhiko Nishizawa

    ACS MACRO LETTERS 1 (3) 400-403 2012/03

    DOI: 10.1021/mz2002406  

    ISSN: 2161-1653

  98. Sequential assembly of the functional material micropatterns on the hydrogel sheet for constructing skeletal muscle cell-based assay system Peer-reviewed

    Nagamine K, Otani S, Ito S, Kaji H, Kanzaki M, Nishizawa M

    Proceedings of the 16th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2012 1054-1056 2012

  99. Ordered molecular assembly inside carbon nanotube forest films for high-efficiency enzymatic biofuel cell Peer-reviewed

    Yoshino S, Miyake T, Kaji H, Yamada T, Hata K, Nishizawa M

    Proceedings of the 16th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2012 1867-1869 2012

  100. Exercise- And drug dose-dependent metabolic assay device using the hydrogel-supported skeletal muscle cells Peer-reviewed

    Nagamine K, Kaji H, Kanzaki M, Nishizawa M

    Proceedings of the 16th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2012 383-385 2012

  101. Enzyme-based biofuel cell designed for direct power generation from biofluids in living organisms Peer-reviewed

    Miyake T, Yoshino S, Ofuji T, Kaji H, Nishizawa M

    Proceedings of the 16th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2012 1432-1434 2012

  102. Enzymatic biofuel cell with self-regulating enzyme-nanotube ensemble films Peer-reviewed

    Takeo Miyake, Syuhei Yoshino, Takeo Yamada, Kenji Hata, Matsuhiko Nishizawa

    Materials Research Society Symposium Proceedings 1415 87-92 2012

    DOI: 10.1557/opl.2012.208  

    ISSN: 0272-9172

  103. Hydrogel-supported skeletal muscle cell-based bioassay system Peer-reviewed

    Kuniaki Nagamine, Shingo Otani, Mai Takeda, Makoto Kanzaki, Matsuhiko Nishizawa

    2011 Int. Symp. on Micro-NanoMechatronics and Human Science, Symp. on "COE for Education and Research of Micro-Nano Mechatronics", Symposium on "Hyper Bio Assembler for 3D Cellular System Innovation" 180-185 2012

    DOI: 10.1109/MHS.2011.6102223  

  104. Enzymatic biofuel cells designed for direct power generation from biofluids in living organisms Peer-reviewed

    Takeo Miyake, Keigo Haneda, Nobuhiro Nagai, Yohei Yatagawa, Hideyuki Onami, Syuhei Yoshino, Toshiaki Abe, Matsuhiko Nishizawa

    ENERGY & ENVIRONMENTAL SCIENCE 4 (12) 5008-5012 2011/12

    DOI: 10.1039/c1ee02200h  

    ISSN: 1754-5692

    eISSN: 1754-5706

  105. Self-Regulating Enzyme-Nanotube Ensemble Films and Their Application as Flexible Electrodes for Biofuel Cells Peer-reviewed

    Takeo Miyake, Syuhei Yoshino, Takeo Yamada, Kenji Hata, Matsuhiko Nishizawa

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 133 (13) 5129-5134 2011/04

    DOI: 10.1021/ja111517e  

    ISSN: 0002-7863

  106. A scalable controlled-release device for transscleral drug delivery to the retina Peer-reviewed

    Takeaki Kawashima, Nobuhiro Nagai, Hirokazu Kaji, Norihiro Kumasaka, Hideyuki Onami, Yumi Ishikawa, Noriko Osumi, Matsuhiko Nishizawa, Toshiaki Abe

    BIOMATERIALS 32 (7) 1950-1956 2011/03

    DOI: 10.1016/j.biomaterials.2010.11.006  

    ISSN: 0142-9612

  107. Spatiotemporally controlled contraction of micropatterned skeletal muscle cells on a hydrogel sheet Peer-reviewed

    Kuniaki Nagamine, Takeaki Kawashima, Soichiro Sekine, Yuichiro Ido, Makoto Kanzaki, Matsuhiko Nishizawa

    LAB ON A CHIP 11 (3) 513-517 2011

    DOI: 10.1039/c0lc00364f  

    ISSN: 1473-0197

    eISSN: 1473-0189

  108. Electrically induced contraction of C2C12 myotubes cultured on a porous membrane-based substrate with muscle tissue-like stiffness Peer-reviewed

    Hirokazu Kaji, Takeshi Ishibashi, Kuniaki Nagamine, Makoto Kanzaki, Matsuhiko Nishizawa

    BIOMATERIALS 31 (27) 6981-6986 2010/09

    DOI: 10.1016/j.biomaterials.2010.05.071  

    ISSN: 0142-9612

    eISSN: 1878-5905

  109. Conducting Polymer Electrodes Printed on Hydrogel Peer-reviewed

    Soichiro Sekine, Yuichiro Ido, Takeo Miyake, Kuniaki Nagamine, Matsuhiko Nishizawa

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 132 (38) 13174-13175 2010/09

    DOI: 10.1021/ja1062357  

    ISSN: 0002-7863

  110. Electrodes Combined with an Agarose Stamp for Addressable Micropatterning Peer-reviewed

    Soichiro Sekine, Shinya Nakanishi, Takeo Miyake, Kuniaki Nagamine, Hirokazu Kaji, Matsuhiko Nishizawa

    LANGMUIR 26 (13) 11526-11529 2010/07

    DOI: 10.1021/la100735e  

    ISSN: 0743-7463

  111. Preparation and characterization of collagen microspheres for sustained release of VEGF Peer-reviewed

    Nobuhiro Nagai, Norihiro Kumasaka, Takeaki Kawashima, Hirokazu Kaji, Matsuhiko Nishizawa, Toshiaki Abe

    JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE 21 (6) 1891-1898 2010/06

    DOI: 10.1007/s10856-010-4054-0  

    ISSN: 0957-4530

    eISSN: 1573-4838

  112. Micropatterning Contractile C2C12 Myotubes Embedded in a Fibrin Gel Peer-reviewed

    Kuniaki Nagamine, Takeaki Kawashima, Takeshi Ishibashi, Hirokazu Kaji, Makoto Kanzaki, Matsuhiko Nishizawa

    BIOTECHNOLOGY AND BIOENGINEERING 105 (6) 1161-1167 2010/04

    DOI: 10.1002/bit.22636  

    ISSN: 0006-3592

  113. Gel sheet based skeletal muscle cell culture system integrated with the microelectrode array device Peer-reviewed

    Nagamine K, Kaji H, Kanzaki M, Nishizawa M

    14th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2010, MicroTAS 2010 1 175-177 2010

  114. Transfer of two-dimensional patterns of human umbilical vein endothelial cells into fibrin gels to facilitate vessel formation Peer-reviewed

    Takeaki Kawashima, Takeshi Yokoi, Hirokazu Kaji, Matsuhiko Nishizawa

    CHEMICAL COMMUNICATIONS 46 (12) 2070-2072 2010

    DOI: 10.1039/b924397f  

    ISSN: 1359-7345

  115. Directing the flow of medium in controlled cocultures of HeLa cells and human umbilical vein endothelial cells with a microfluidic device Peer-reviewed

    Hirokazu Kaji, Takeshi Yokoi, Takeaki Kawashima, Matsuhiko Nishizawa

    LAB ON A CHIP 10 (18) 2374-2379 2010

    DOI: 10.1039/c004583g  

    ISSN: 1473-0197

  116. Monitoring impedance changes associated with motility and mitosis of a single cell Peer-reviewed

    Lamya Ghenim, Hirokazu Kaji, Yu Hoshino, Takeshi Ishibashi, Vincent Haguet, Xavier Gidrol, Matsuhiko Nishizawa

    LAB ON A CHIP 10 (19) 2546-2550 2010

    DOI: 10.1039/c004115g  

    ISSN: 1473-0197

  117. Automatic, sequential power generation for prolonging the net lifetime of a miniature biofuel cell stack Peer-reviewed

    Takeo Miyake, Masato Oike, Syuhei Yoshino, Yohei Yatagawa, Keigo Haneda, Matsuhiko Nishizawa

    LAB ON A CHIP 10 (19) 2574-2578 2010

    DOI: 10.1039/c004322b  

    ISSN: 1473-0197

    eISSN: 1473-0189

  118. Integration of QCMs for Studying Surface Science within a Microfluidic Channel

    ITASAKA Yousuke, NISHIZAWA Matsuhiko, ABE Takashi

    The Journal of the Institute of Electrical Engineers of Japan 129 (12) 439-443 2009/12/01

    Publisher: The Institute of Electrical Engineers of Japan

    DOI: 10.1541/ieejsmas.129.439  

    ISSN: 1341-8939

    More details Close

    This paper reports integration of quartz-crystal microbalance (QCM) sensors on a monolithic quartz crystal plate without using microfabrication. The QCM sensor used for this study is specially developed for sensing within a microfluidic channel. In this study, the distance between QCMs was optimized by monitoring frequency change caused by a mass load onto a neighboring QCM. It was found that circular shape QCM is suitable for the integration. The optimized QCM array was used for monitoring an etching of a gold electrode of the QCM by electrochemically generated oxidant. The measured phenomenon is practically useful for the cleaning of an integrated sensor within a packaged microfluidic channel.

  119. Spatiotemporal sub-cellular biopatterning using an AFM-assisted electrochemical system Peer-reviewed

    Soichiro Sekine, Hirokazu Kaji, Matsuhiko Nishizawa

    ELECTROCHEMISTRY COMMUNICATIONS 11 (9) 1781-1784 2009/09

    DOI: 10.1016/j.elecom.2009.07.016  

    ISSN: 1388-2481

  120. Biofuel cell anode: NAD(+)/glucose dehydrogenase-coimmobilized ketjenblack electrode Peer-reviewed

    T. Miyake, M. Oike, S. Yoshino, Y. Yatagawa, K. Haneda, H. Kaji, M. Nishizawa

    CHEMICAL PHYSICS LETTERS 480 (1-3) 123-126 2009/09

    DOI: 10.1016/j.cplett.2009.08.075  

    ISSN: 0009-2614

    eISSN: 1873-4448

  121. Axisymmetric polydimethysiloxane microchannels for in vitro hemodynamic studies Peer-reviewed

    Rui Lima, Monica S. N. Oliveira, Takuji Ishikawa, Hirokazu Kaji, Shuji Tanaka, Matsuhiko Nishizawa, Takami Yamaguchi

    BIOFABRICATION 1 (3) 035005-035005 2009/09

    DOI: 10.1088/1758-5082/1/3/035005  

    ISSN: 1758-5082

  122. Selective capture of a specific cell type from mixed leucocytes in an electrode-integrated microfluidic device Peer-reviewed

    Masahiko Hashimoto, Hirokazu Kaji, Matsuhiko Nishizawa

    BIOSENSORS & BIOELECTRONICS 24 (9) 2892-2897 2009/05

    DOI: 10.1016/j.bios.2009.02.025  

    ISSN: 0956-5663

    eISSN: 1873-4235

  123. Red blood cell motions in high-hematocrit blood flowing through a stenosed microchannel Peer-reviewed

    H. Fujiwara, T. Ishikawa, R. Lima, N. Matsuki, Y. Imai, H. Kaji, M. Nishizawa, T. Yamaguchi

    JOURNAL OF BIOMECHANICS 42 (7) 838-843 2009/05

    DOI: 10.1016/j.jbiomech.2009.01.026  

    ISSN: 0021-9290

  124. Localized electrical stimulation to C2C12 myotubes cultured on a porous membrane-based substrate Peer-reviewed

    Takeshi Ishibashi, Yu Hoshino, Hirokazu Kaji, Makoto Kanzaki, Masaaki Sato, Matsuhiko Nishizawa

    BIOMEDICAL MICRODEVICES 11 (2) 413-419 2009/04

    DOI: 10.1007/s10544-008-9247-7  

    ISSN: 1387-2176

  125. Microfluidic biofuel cells: Series-connection with superhydrophobic air valves Peer-reviewed

    M. Togo, K. Morimoto, T. Abe, H. Kaji, M. Nishizawa

    TRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems 2102-2105 2009

    DOI: 10.1109/SENSOR.2009.5285620  

  126. Evaluation of a cleaning process inside a microfluidic channel using a single-chip QCM array Peer-reviewed

    Abe T, Itasaka Y, Kaji H, Nishizawa M

    Proceedings of Conference, MicroTAS 2009 - The 13th International Conference on Miniaturized Systems for Chemistry and Life Sciences 1650-1652 2009

  127. Electrochemical In-Situ Micropatterning of Cells and Polymers Peer-reviewed

    M. Nishizawa, H. Kaji, S. Sekine

    13TH INTERNATIONAL CONFERENCE ON BIOMEDICAL ENGINEERING, VOLS 1-3 23 (1-3) 2173-2176 2009

    ISSN: 1680-0737

  128. Controlled cocultures of HeLa cells and human umbilical vein endothelial cells on detachable substrates Peer-reviewed

    Hirokazu Kaji, Takeshi Yokoi, Takeaki Kawashima, Matsuhiko Nishizawa

    LAB ON A CHIP 9 (3) 427-432 2009

    DOI: 10.1039/b812510d  

    ISSN: 1473-0197

  129. Confocal micro-PTV Measurements of Blood Flow in a Circular PDMS Microchannel

    R. Lima, T. Ishikawa, H. Kaji, Y. Imai, S. Wada, M. Nishizawa, T. Yamaguchi

    Bioengineering 08 Book of Abstracts 166 2008/09/01

  130. Integration of an electrochemical-based biolithography technique into an AFM system Peer-reviewed

    Soichiro Sekine, Hirokazu Kaji, Matsuhiko Nishizawa

    ANALYTICAL AND BIOANALYTICAL CHEMISTRY 391 (8) 2711-2716 2008/08

    DOI: 10.1007/s00216-008-1952-9  

    ISSN: 1618-2642

  131. Conducting polymer-based electrodes for controlling cellular functions Peer-reviewed

    Matsuhiko Nishizawa, Takahiro Kitazume, Hirokazu Kaji

    ELECTROCHEMISTRY 76 (8) 532-534 2008/08

    DOI: 10.5796/electrochemistry.76.532  

    ISSN: 1344-3542

  132. Patterning adherent cells within microchannels by combination of electrochemical biolithography technique and repulsive dielectrophoretic force Peer-reviewed

    Hirokazu Kaji, Masahiko Hashimoto, Soichiro Sekine, Takeaki Kawashima, Matsuhiko Nishizawa

    ELECTROCHEMISTRY 76 (8) 555-558 2008/08

    DOI: 10.5796/electrochemistry.76.555  

    ISSN: 1344-3542

  133. Structural studies of enzyme-based microfluidic biofuel cells Peer-reviewed

    Makoto Togo, Akimasa Takamura, Tatsuya Asai, Hirokazu Kaji, Matsuhiko Nishizawa

    JOURNAL OF POWER SOURCES 178 (1) 53-58 2008/03

    DOI: 10.1016/j.jpowsour.2007.12.052  

    ISSN: 0378-7753

  134. Control of cellular adhesion within microfluidic device using electrochemical biolithography and dielectrophoresis for cell-based assay Peer-reviewed

    M. Hashimoto, H. Kaji, M. Nishizawa

    ECS Transactions 16 (14) 11-20 2008

    DOI: 10.1149/1.2992223  

    ISSN: 1938-5862 1938-6737

  135. Patterning adherent cells within microchannels by combination of electrochemical biolithography and dielectrophoresis Peer-reviewed

    Kaji H, Hashimoto M, Nishizawa M

    12th International Conference on Miniaturized Systems for Chemistry and Life Sciences - The Proceedings of MicroTAS 2008 Conference 570-572 2008

  136. Localized immobilization of proteins onto microstructures within a preassembled microfluidic device Peer-reviewed

    Masahiko Hashimoto, Hirokazu Kaji, Maria E. Kemppinen, Matsuhiko Nishizawa

    SENSORS AND ACTUATORS B-CHEMICAL 128 (2) 545-551 2008/01

    DOI: 10.1016/j.snb.2007.07.065  

    ISSN: 0925-4005

    eISSN: 0925-4005

  137. Tracking of red blood cells in microchannel with stenosis by confocal micro PTV system Peer-reviewed

    H. Fujiwara, T. Ishikawa, R. Lima, Y. Imai, N. Matsuki, H. Kaji, D. Mori, M. Nishizawa, T. Yamaguchi

    Proc. 7th Int. Symp. Adv. Fluid Info. & 4th Int. Symp. Transdisciplinary Fluid Integr. 56-57 2007/12/01

  138. Blood flow in microchannel with stenosis measured by a confocal micro PTV system Peer-reviewed

    H. Fujiwara, T. Ishikawa, R. Lima, Y. Imai, N. Matsuki, H. Kaji, D. Mori, M. Nishizawa, T. Yamaguchi

    Proc. 3rd Tohoku-NUS Joint Symp. Nano-Biomed. Eng. in the East Asian-Pacific Rim Region 99-100 2007/12/01

  139. A porous membrane-based culture substrate for localized in situ electroporation of adherent mammalian cells Peer-reviewed

    Takeshi Ishibashi, Kimiyasu Takoh, Hirokazu Kaji, Takashi Abe, Matsuhiko Nishizawa

    SENSORS AND ACTUATORS B-CHEMICAL 128 (1) 5-11 2007/12

    DOI: 10.1016/j.snb.2007.05.027  

    ISSN: 0925-4005

  140. Observation of the Blood Flow in Microchannel with Stenosis by Confocal-Micro-PIV Peer-reviewed

    H. Fujiwara, T. Ishikawa, R. Lima, H. Kaji, N. Matsuki, Y. Imai, M. Nishizawa, T. Yamaguchi

    Proc. 3rd Asian Pacific Conf. Biomech. S89 2007/11/01

  141. Stepwise formation of patterned cell co-cultures in silicone tubing Peer-reviewed

    Hirokazu Kaji, Soichiro Sekine, Masahiko Hashimoto, Takeaki Kawashima, Matsuhiko Nishizawa

    BIOTECHNOLOGY AND BIOENGINEERING 98 (4) 919-925 2007/11

    DOI: 10.1002/bit.21505  

    ISSN: 0006-3592

  142. Anisotropic growth of conducting polymers along heparin-modified surfaces Peer-reviewed

    Matsuhiko Nishizawa, Takashi Kamiya, Hyuma Nozaki, Hirokazu Kaji

    LANGMUIR 23 (16) 8304-8307 2007/07

    DOI: 10.1021/la700716f  

    ISSN: 0743-7463

  143. An enzyme-based microfluidic biofuel cell using vitamin K-3-mediated glucose oxidation Peer-reviewed

    Makoto Togo, Akimasa Takamura, Tatsuya Asai, Hirokazu Kaji, Matsuhiko Nishizawa

    ELECTROCHIMICA ACTA 52 (14) 4669-4674 2007/04

    DOI: 10.1016/j.electacta.2007.01.067  

    ISSN: 0013-4686

  144. Electrodeposition of anchored polypyrrole film on microelectrodes and stimulation of cultured cardiac myocytes Peer-reviewed

    Matsuhiko Nishizawa, Hyuma Nozaki, Hirokazu Kaji, Takahiro Kitazume, Noriyuki Kobayashi, Takeshi Ishibashi, Takashi Abe

    BIOMATERIALS 28 (8) 1480-1485 2007/03

    DOI: 10.1016/j.biomaterials.2006.11.034  

    ISSN: 0142-9612

  145. Arrangement of cells within semi-closed space with microelectrode-based technique

    Masahiko Hashimoto, Soichiro Sekine, Takeaki Kawashima, Hirokazu Kaji, Matsuhiko Nishizawa

    Proceedings of the 11th International Conference on Miniaturized Systems for Chemistry and Life Sciences, uTAS 2007 1318-1320 2007

    Publisher: Chemical and Biological Microsystems Society

  146. Hybrid micropatterns of cells and conducting polymers

    Matsuhiko Nishizawa, Takashi Kamiya, Soichiro Sekine, Takeaki Kawashima, Hirokazu Kaji, Takashi Abe

    Proceedings of the 11th International Conference on Miniaturized Systems for Chemistry and Life Sciences, uTAS 2007 787-789 2007

    Publisher: Chemical and Biological Microsystems Society

  147. Generation of patterned cell Co-cultures in silicone tubing using a microelectrode technique and electrostatic assembly Peer-reviewed

    Hirokazu Kaji, Soichiro Sekine, Masahiko Hashimoto, Takeaki Kawashima, Matsuhiko Nishizawa

    Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings 5860-5863 2007

    DOI: 10.1109/IEMBS.2007.4353681  

    ISSN: 0589-1019

  148. Generation of patterned cell co-cultures in silicone tubing using a microelectrode technique and electrostatic assembly Peer-reviewed

    Hirokazu Kaji, Soichiro Sekine, Masahiko Hashimoto, Takeaki Kawashima, Matsuhiko Nishizawa

    2007 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-16 5861-5864 2007

    ISSN: 1094-687X

  149. Generation of patterned cell co-cultures inside tubular structure using electrochemical biolithography and electrostatic assembly Peer-reviewed

    Hirokazu Kaji, Soichiro Sekine, Takashi Abe, Matsuhiko Nishizawa

    2007 INTERNATIONAL SYMPOSIUM ON MICRO-NANO MECHATRONICS AND HUMAN SCIENCE, VOLS 1 AND 2 187-192 2007

    ISSN: 2474-378X

    eISSN: 2474-3798

  150. Structure and electron density analysis of electrochemically and chemically delithiated LiCoO(2) single crystals Peer-reviewed

    Yasuhiko Takahashi, Norihito Kijima, Kaoru Dokko, Matsuhiko Nishizawa, Isamu Uchida, Junji Akimoto

    JOURNAL OF SOLID STATE CHEMISTRY 180 (1) 313-321 2007/01

    DOI: 10.1016/j.jssc.2006.10.018  

    ISSN: 0022-4596

  151. Patterning cellular motility using an electrochemical technique and a geometrically confined environment Peer-reviewed

    Hirokazu Kaji, Takeaki Kawashima, Matsuhiko Nishizawa

    LANGMUIR 22 (25) 10784-10787 2006/12

    DOI: 10.1021/la0610654  

    ISSN: 0743-7463

  152. On-demand patterning of protein matrixes inside a microfluidic device Peer-reviewed

    Hirokazu Kaji, Masahiko Hashimoto, Matsuhiko Nishizawa

    ANALYTICAL CHEMISTRY 78 (15) 5469-5473 2006/08

    DOI: 10.1021/ac060304p  

    ISSN: 0003-2700

  153. Erratum to "Amperometric nitric oxide microsensor using two-dimensional cross-linked Langmuir-Blodgett films of polysiloxane copolymer" [Sens. Actuators B 108 (1-2) (2005) 384-388] (DOI:10.1016/j.snb.2004.12.095)

    Dai Kato, Masashi Kunitake, Matsuhiko Nishizawa, Tomokazu Matsue, Fumio Mizutani

    Sensors and Actuators, B: Chemical 115 560 2006/05/23

    DOI: 10.1016/j.snb.2005.08.001  

    ISSN: 0925-4005

  154. Development of a cell culture system for dynamically controlling cell motility Peer-reviewed

    Kaji H, Kawashima T, Nishizawa M

    Micro Total Analysis Systems - Proceedings of MicroTAS 2006 Conference: 10th International Conference on Miniaturized Systems for Chemistry and Life Sciences 972-974 2006

  155. Integration of antibody arrays into a preassembled microfluidic device for on-demand immunoassay Peer-reviewed

    Hashimoto M, Kaji H, Kemppinen M.E, Nishizawa M

    Micro Total Analysis Systems - Proceedings of MicroTAS 2006 Conference: 10th International Conference on Miniaturized Systems for Chemistry and Life Sciences 846-848 2006

  156. An electrochemical microsystem for manipulating living cells Peer-reviewed

    Hirokazu Kaji, Masahiko Hashimoto, Takeaki Kawashima, Takashi Abe, Matsuhiko Nishizawa

    FUTURE MEDICAL ENGINEERING BASED ON BIONANOTECHNOLOGY, PROCEEDINGS 3-+ 2006

  157. Electrochemical approach to pattern cells within three-dimensional microstructures Peer-reviewed

    Matsuhiko Nishizawa, Takashi Abe, Hirokazu Kaji

    2006 IEEE INTERNATIONAL SYMPOSIUM ON MICRO-NANOMECHATRONICS AND HUMAN SCIENCE 242-+ 2006

    ISSN: 2474-378X

    eISSN: 2474-3798

  158. Enzyme-based glucose biofuel cell using vitamin K-3-immobilized polymer as electron mediator Peer-reviewed

    Makoto Togo, Tatsuya Asai, Fuyuki Sato, Hirokazu Kaji, Takashi Abe, Matsuhiko Nishizawa

    FUTURE MEDICAL ENGINEERING BASED ON BIONANOTECHNOLOGY, PROCEEDINGS 173-+ 2006

  159. Electrochemical nitric oxide microsensors based on two-dimensional cross-linked polymeric LB films of oligo(dimethylsiloxane) copolymer

    Dai Kato, Masashi Kunitake, Matsuhiko Nishizawa, Tomokazu Matsue, Fumio Mizutani

    Electrochimica Acta 51 938-942 2005/11/10

    DOI: 10.1016/j.electacta.2005.04.072  

    ISSN: 0013-4686

  160. Localized chemical stimulation of cellular micropatterns using a porous membrane-based culture substrate Peer-reviewed

    K Takoh, T Ishibashi, T Matsue, M Nishizawa

    SENSORS AND ACTUATORS B-CHEMICAL 108 (1-2) 683-687 2005/07

    DOI: 10.1016/j.snb.2004.12.090  

    ISSN: 0925-4005

  161. Amperometric nitric oxide microsensor using two-dimensional cross-linked Langmuir-Blodgett films of polysiloxane copolymer Peer-reviewed

    D Kato, M Kunitake, M Nishizawa, T Matsue, F Mizutani

    SENSORS AND ACTUATORS B-CHEMICAL 108 (1-2) 384-388 2005/07

    DOI: 10.1016/j.snb.2004.12.095  

    ISSN: 0925-4005

  162. Three-dimensional micro-culture system with a silicon-based cell array device for multi-channel drug sensitivity test Peer-reviewed

    Y Torisawa, H Shiku, T Yasukawa, M Nishizawa, T Matsue

    SENSORS AND ACTUATORS B-CHEMICAL 108 (1-2) 654-659 2005/07

    DOI: 10.1016/j.snb.2004.11.045  

    ISSN: 0925-4005

  163. Enzyme-based glucose fuel cell using Vitamin K-3-immobilized polymer as an electron mediator Peer-reviewed

    F Sato, M Togo, MK Islam, T Matsue, J Kosuge, N Fukasaku, S Kurosawa, M Nishizawa

    ELECTROCHEMISTRY COMMUNICATIONS 7 (7) 643-647 2005/07

    DOI: 10.1016/j.elecom.2005.04.015  

    ISSN: 1388-2481

  164. Patterning the surface cytophobicity of an albumin-physisorbed substrate by electrochemical means Peer-reviewed

    H Kaji, K Tsukidate, M Hashimoto, T Matsue, M Nishizawa

    LANGMUIR 21 (15) 6966-6969 2005/07

    DOI: 10.1021/la050660n  

    ISSN: 0743-7463

  165. Multi-channel 3-D cell culture device integrated on a silicon chip for anticancer drug sensitivity test Peer-reviewed

    Y Torisawa, H Shiku, T Yasukawa, M Nishizawa, T Matsue

    BIOMATERIALS 26 (14) 2165-2172 2005/05

    DOI: 10.1016/j.biomaterials.2004.05.028  

    ISSN: 0142-9612

  166. Elcrochemical bio-lithography for in-situ immobilization of proteins and cells within microchannels Peer-reviewed

    M Nishizawa, H Kaji, K Tsukidate, M Hashimoto, T Abe

    Transducers '05, Digest of Technical Papers, Vols 1 and 2 1 151-154 2005

    DOI: 10.1109/SENSOR.2005.1496381  

  167. Electrochemical bio-lithography for controlling bionic interfaces Peer-reviewed

    Nishizawa M, Kaji H, Takoh K, Matsue T

    Proceedings - Electrochemical Society PV 2004-13 577-583 2005

  168. Electrochemical approach to pattern proteins and cells within microchannels Peer-reviewed

    Kaji H, Hashimoto M, Tsukidate K, Matsue T, Nishizawa M

    Micro Total Analysis Systems - Proceedings of MicroTAS 2005 Conference: 9th International Conference on Miniaturized Systems for Chemistry and Life Sciences 1 1309-1311 2005

  169. Electrochemical bio-lithography for in situ control of cellular adhesion and growth on a chip Peer-reviewed

    M Nishizawa, H Kaji

    2005 3rd IEEE/EMBS Special Topic Conference on Microtechnology in Medicine and Biology 396-397 2005

  170. Selective permeable membrane based on two dimensional cross-linked polysiloxane LB films for nitric oxide sensor

    Dai Kato, Fumio Mizutani, Masashi Kunitake, Matsuhiko Nishizawa, Tomokazu Matsue

    Proceedings - Electrochemical Society 8 147-153 2004/12/01

  171. Microstamp-based micromachining for modulation of growth of cultured neuronal cells Peer-reviewed

    Y Takii, H Kaji, T Matsue, M Nishizawa

    JSME INTERNATIONAL JOURNAL SERIES C-MECHANICAL SYSTEMS MACHINE ELEMENTS AND MANUFACTURING 47 (4) 956-961 2004/12

    DOI: 10.1299/jsmec.47.956  

    ISSN: 1344-7653

  172. In situ control of cellular growth and migration on substrates using microelectrodes Peer-reviewed

    H Kaji, K Tsukidate, T Matsue, M Nishizawa

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 126 (46) 15026-15027 2004/11

    DOI: 10.1021/ja045702t  

    ISSN: 0002-7863

  173. A porous membrane-based microelectroanalytical technique for evaluating locally stimulated culture cells Peer-reviewed

    K Takoh, A Takahashi, T Matsue, M Nishizawa

    ANALYTICA CHIMICA ACTA 522 (1) 45-49 2004/09

    DOI: 10.1016/j.aca.2004.06.053  

    ISSN: 0003-2670

  174. Proliferation assay on a silicon chip applicable for tumors extirpated from mammalians Peer-reviewed

    YS Torisawa, H Shiku, S Kasai, M Nishizawa, T Matsue

    INTERNATIONAL JOURNAL OF CANCER 109 (2) 302-308 2004/03

    DOI: 10.1002/ijc.11693  

    ISSN: 0020-7136

  175. Microelectrochemical approach to induce local cell adhesion and growth on substrates Peer-reviewed

    H Kaji, M Kanada, D Oyamatsu, T Matsue, M Nishizawa

    LANGMUIR 20 (1) 16-19 2004/01

    DOI: 10.1021/la035537f  

    ISSN: 0743-7463

  176. Pharmacological characterization of micropatterned cardiac myocytes Peer-reviewed

    H Kaji, Y Takii, M Nishizawa, T Matsue

    BIOMATERIALS 24 (23) 4239-4244 2003/10

    DOI: 10.1016/S0142-9612(03)00275-8  

    ISSN: 0142-9612

  177. Monitoring the cellular activity of a cultured single cell by scanning electrochemical microscopy (SECM). A comparison with fluorescence viability monitoring Peer-reviewed

    T Kaya, YS Torisawa, D Oyamatsu, M Nishizawa, T Matsue

    BIOSENSORS & BIOELECTRONICS 18 (11) 1379-1383 2003/10

    DOI: 10.1016/S0956-5663(03)00083-6  

    ISSN: 0956-5663

  178. Characterization of local respiratory activity of PC12 neuronal cell by scanning electrochemical microscopy Peer-reviewed

    Y Takii, K Takoh, M Nishizawa, T Matsue

    ELECTROCHIMICA ACTA 48 (20-22) 3381-3385 2003/09

    DOI: 10.1016/S0013-4686(03)00408-0  

    ISSN: 0013-4686

  179. Imaging of enzyme activity by scanning electrochemical microscope equipped with a feedback control for substrate-probe distance Peer-reviewed

    D Oyamatsu, Y Hirano, N Kanaya, Y Mase, M Nishizawa, T Matsue

    BIOELECTROCHEMISTRY 60 (1-2) 115-121 2003/08

    DOI: 10.1016/S1567-5394(03)00055-0  

    ISSN: 1567-5394

  180. A microbial chip for glucose sensing studied with scanning electrochemical microscopy (SECM) Peer-reviewed

    T Kaya, K Nagamine, D Oyamatsu, M Nishizawa, T Matsue

    ELECTROCHEMISTRY 71 (6) 436-438 2003/06

    ISSN: 1344-3542

  181. Area-selective immobilization of multi enzymes by using the reductive desorption of self-assembled monolayer Peer-reviewed

    D Oyamatsu, N Kanaya, Y Hirano, M Nishizawa, T Matsue

    ELECTROCHEMISTRY 71 (6) 439-441 2003/06

    ISSN: 1344-3542

  182. Electrochemical/photochemical formation of enzyme patterns on glass substrates using a scanning electrochemical/confocal microscope Peer-reviewed

    D Oyamatsu, N Kanaya, H Shiku, M Nishizawa, T Matsue

    SENSORS AND ACTUATORS B-CHEMICAL 91 (1-3) 199-204 2003/06

    DOI: 10.1016/S0925-4005(03)00089-3  

    ISSN: 0925-4005

  183. Scanning electrochemical microscopy-based drug sensitivity test for a cell culture integrated in silicon microstructures Peer-reviewed

    YS Torisawa, T Kaya, Y Takii, D Oyamatsu, M Nishizawa, T Matsue

    ANALYTICAL CHEMISTRY 75 (9) 2154-2158 2003/05

    DOI: 10.1021/ac026317u  

    ISSN: 0003-2700

  184. Imaging of immobilized enzyme spots by scanning chemiluminescence microscopy with electrophoretic injection Peer-reviewed

    Y Hirano, Y Mitsumori, D Oyamatsu, M Nishizawa, T Matsue

    BIOSENSORS & BIOELECTRONICS 18 (5-6) 587-590 2003/05

    DOI: 10.1016/S0956-5663(03)00031-9  

    ISSN: 0956-5663

  185. Intracellular Ca2+ imaging for micropatterned cardiac myocytes Peer-reviewed

    H Kaji, K Takoh, M Nishizawa, T Matsue

    BIOTECHNOLOGY AND BIOENGINEERING 81 (6) 748-751 2003/03

    DOI: 10.1002/bit.10521  

    ISSN: 0006-3592

  186. A valveless switch for microparticle sorting with laminar flow streams and electrophoresis perpendicular to the direction of fluid stream Peer-reviewed

    T Takahashi, S Ogata, M Nishizawa, T Matsue

    ELECTROCHEMISTRY COMMUNICATIONS 5 (2) 175-177 2003/02

    DOI: 10.1016/S1388-2481(03)00002-X  

    ISSN: 1388-2481

  187. Structure and Electron Density Analysis of Lithium Manganese Oxides by Single-Crystal X-ray Diffraction Peer-reviewed

    Y. Takahashi, J. Akimoto, Y. Gotoh, K. Dokko, M. Nishizawa, I. Uchida

    J. Phys. Soc. Jpn. 72 1483-1490 2003

    DOI: 10.1143/JPSJ.72.1483  

  188. Localized chemical stimulation to micropatterned cells using multiple laminar fluid flows Peer-reviewed

    H Kaji, M Nishizawa, T Matsue

    LAB ON A CHIP 3 (3) 208-211 2003

    DOI: 10.1039/b304350a  

    ISSN: 1473-0189

  189. Fabrication of microbial chip using collagen gel microstructure Peer-reviewed

    T Kaya, K Nagamine, D Oyamatsu, H Shiku, M Nishizawa, T Matsue

    LAB ON A CHIP 3 (4) 313-317 2003

    DOI: 10.1039/b309349b  

    ISSN: 1473-0189

  190. Micropatterned HeLa cell culture on PEG monolayer-coated glass substrates Peer-reviewed

    M Nishizawa, A Takahashi, H Kaji, T Matsue

    CHEMISTRY LETTERS (9) 904-905 2002/09

    DOI: 10.1246/cl.2002.904  

    ISSN: 0366-7022

    eISSN: 1348-0715

  191. Simultaneous detection of uric acid and glucose on a dual-enzyme chip using scanning electrochemical microscopy/scanning chemiluminescence microscopy Peer-reviewed

    S Kasai, Y Hirano, N Motochi, H Shiku, M Nishizawa, T Matsue

    ANALYTICA CHIMICA ACTA 458 (2) 263-270 2002/05

    DOI: 10.1016/S0003-2670(02)00064-8  

    ISSN: 0003-2670

  192. Micropatterning of HeLa cells on glass substrates and evaluation of respiratory activity using microelectrodes Peer-reviewed

    M Nishizawa, K Takoh, T Matsue

    LANGMUIR 18 (9) 3645-3649 2002/04

    DOI: 10.1021/la011576k  

    ISSN: 0743-7463

  193. Microvoltammetric study of electrochemical properties of a single spherical nickel hydroxide particle Peer-reviewed

    HS Kim, T Itoh, M Nishizawa, M Mohamedi, M Umeda, Uchida, I

    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 27 (3) 295-300 2002/03

    DOI: 10.1016/S0360-3199(01)00118-5  

    ISSN: 0360-3199

  194. Rapid evaluation of charge/discharge properties for lithium manganese oxide particles at elevated temperatures Peer-reviewed

    K Dokko, S Horikoshi, T Itoh, M Nishizawa, T Abe, M Umeda, Uchida, I

    JOURNAL OF SOLID STATE ELECTROCHEMISTRY 6 (3) 188-193 2002/03

    DOI: 10.1007/s100080100216  

    ISSN: 1432-8488

  195. Microspots of GOD-HRP bienzyme for scanning chemiluminescence microscopy with higher resolution Peer-reviewed

    Y Hirano, S Kasai, M Nishizawa, T Matsue

    ELECTROCHEMISTRY 69 (12) 946-948 2001/12

    ISSN: 1344-3542

  196. A microbial chip combined with scanning electrochemical microscopy Peer-reviewed

    T Kaya, M Nishizawa, T Yasukawa, M Nishiguchi, T Onouchi, T Matsue

    BIOTECHNOLOGY AND BIOENGINEERING 76 (4) 391-394 2001/11

    DOI: 10.1002/bit.10085  

    ISSN: 0006-3592

  197. Electrochemical studies of Li-ion extraction and insertion of LiMn2O4 single crystal Peer-reviewed

    K Dokko, M Nishizawa, M Mohamedi, M Umeda, Uchida, I, J Akimoto, Y Takahashi, Y Gotoh, S Mizuta

    ELECTROCHEMICAL AND SOLID STATE LETTERS 4 (9) A151-A153 2001/09

    DOI: 10.1149/1.1389875  

    ISSN: 1099-0062

  198. Controlling ion-transport selectivity in gold nanotubule membranes Peer-reviewed

    CR Martin, M Nishizawa, K Jirage, MS Kang, SB Lee

    ADVANCED MATERIALS 13 (18) 1351-1362 2001/09

    DOI: 10.1002/1521-4095(200109)13:18<1351::AID-ADMA1351>3.0.CO;2-W  

    ISSN: 0935-9648

  199. In situ SERS spectroscopy of Ag-modified pyrolytic graphite in organic electrolytes Peer-reviewed

    T Itoh, K Abe, M Mohamedi, M Nishizawa, Uchida, I

    JOURNAL OF SOLID STATE ELECTROCHEMISTRY 5 (5) 328-333 2001/07

    DOI: 10.1007/s100080000139  

    ISSN: 1432-8488

  200. Recent investigations on thin films and single particles of transition metal oxides for lithium batteries Peer-reviewed

    Uchida, I, M Mohamedi, K Dokko, M Nishizawa, T Itoh, M Umeda

    JOURNAL OF POWER SOURCES 97-8 518-524 2001/07

    DOI: 10.1016/S0378-7753(01)00724-8  

    ISSN: 0378-7753

  201. Kinetic characterization of single particles of LiCoO2 by AC impedance and potential step methods Peer-reviewed

    K Dokko, M Mohamedi, Y Fujita, T Itoh, M Nishizawa, M Umeda, Uchida, I

    JOURNAL OF THE ELECTROCHEMICAL SOCIETY 148 (5) A422-A426 2001/05

    DOI: 10.1149/1.1359197  

    ISSN: 0013-4651

  202. Investigations of the transport properties of gold nanotubule membranes Peer-reviewed

    CR Martin, M Nishizawa, K Jirage, M Kang

    JOURNAL OF PHYSICAL CHEMISTRY B 105 (10) 1925-1934 2001/03

    DOI: 10.1021/jp003486e  

    ISSN: 1089-5647

  203. Explicit analysis of impedance spectra related to thin films of spinel LiMn2O4 Peer-reviewed

    M Mohamedi, D Takahashi, T Uchiyama, T Itoh, M Nishizawa, Uchida, I

    JOURNAL OF POWER SOURCES 93 (1-2) 93-103 2001/02

    DOI: 10.1016/S0378-7753(00)00551-6  

    ISSN: 0378-7753

    eISSN: 1873-2755

  204. Amorphous tin oxide films: preparation and characterization as an anode active material for lithium ion batteries Peer-reviewed

    M Mohamedi, SJ Lee, D Takahashi, M Nishizawa, T Itoh, Uchida, I

    ELECTROCHIMICA ACTA 46 (8) 1161-1168 2001/01

    DOI: 10.1016/S0013-4686(00)00702-7  

    ISSN: 0013-4686

  205. Immunoassay of the MRSA-related toxic protein, leukocidin, with scanning electrochemical microscopy Peer-reviewed

    S Kasai, A Yokota, HF Zhou, M Nishizawa, K Niwa, T Onouchi, T Matsue

    ANALYTICAL CHEMISTRY 72 (23) 5761-5765 2000/12

    DOI: 10.1021/ac000895y  

    ISSN: 0003-2700

  206. Microvoltammetry for cathode materials at elevated temperatures: electrochemical stability of single particles Peer-reviewed

    K Dokko, S Horikoshi, T Itoh, M Nishizawa, M Mohamedi, Uchida, I

    JOURNAL OF POWER SOURCES 90 (1) 109-115 2000/09

    DOI: 10.1016/S0378-7753(00)00456-0  

    ISSN: 0378-7753

    eISSN: 1873-2755

  207. Electric-field dependent redox electron transfer in an organic solid: study of carrier photogeneration efficiency Peer-reviewed

    M Umeda, M Nishizawa, T Itoh, Selman, JR, Uchida, I

    CHEMICAL PHYSICS LETTERS 326 (3-4) 219-224 2000/08

    DOI: 10.1016/S0009-2614(00)00766-1  

    ISSN: 0009-2614

    eISSN: 1873-4448

  208. Electrochemical quartz crystal microbalance investigations of LiMn2O4 thin films at elevated temperatures Peer-reviewed

    T Uchiyama, M Nishizawa, T Itoh, Uchida, I

    JOURNAL OF THE ELECTROCHEMICAL SOCIETY 147 (6) 2057-2060 2000/06

    DOI: 10.1149/1.1393485  

    ISSN: 0013-4651

  209. Electrochemical in-situ conductivity measurements for thin film of Li1-xMn2O4 spinel Peer-reviewed

    M Nishizawa, T Ise, H Koshika, T Itoh, Uchida, I

    CHEMISTRY OF MATERIALS 12 (5) 1367-1371 2000/05

    DOI: 10.1021/cm990696z  

    ISSN: 0897-4756

  210. In situ observation of LiNiO2 single-particle fracture during Li-ion extraction and insertion Peer-reviewed

    K Dokko, M Nishizawa, S Horikoshi, T Itoh, M Mohamedi, Uchida, I

    ELECTROCHEMICAL AND SOLID STATE LETTERS 3 (3) 125-127 2000/03

    DOI: 10.1149/1.1390977  

    ISSN: 1099-0062

  211. High-Speed voltammetry of Mn-doped LiCoO2 using a microelectrode technique Peer-reviewed

    S Waki, K Dokko, T Itoh, M Nishizawa, T Abe, Uchida, I

    JOURNAL OF SOLID STATE ELECTROCHEMISTRY 4 (4) 205-209 2000/03

    DOI: 10.1007/s100080050196  

    ISSN: 1432-8488

  212. High temperature in situ Raman spectroscopy of oxide species in molten (Li + K) carbonate eutectic Peer-reviewed

    T Itoh, K Abe, Y Hisamitsu, M Mohamedi, M Nishizawa, T Abe, P Tomczyk, Uchida, I

    CHEMISTRY LETTERS (10) 1115-1116 1999/10

    DOI: 10.1246/cl.1999.1115  

    ISSN: 0366-7022

    eISSN: 1348-0715

  213. In situ conductance measurement to investigate roles of conductive additives in lithium ion battery electrodes Peer-reviewed

    M Nishizawa, H Koshika, T Itoh, M Mohamedi, T Abe, Uchida, I

    ELECTROCHEMISTRY COMMUNICATIONS 1 (9) 375-378 1999/09

    ISSN: 1388-2481

  214. Electrochemical formation of a polyaniline-analogue monolayer on a gold electrode Peer-reviewed

    S Kuwabata, R Fukuzaki, M Nishizawa, CR Martin, H Yoneyama

    LANGMUIR 15 (20) 6807-6812 1999/09

    DOI: 10.1021/la981719b  

    ISSN: 0743-7463

  215. Microvoltammetric study of electrochemical hydrogenation of a surface-treated Mg2Ni alloy single particle Peer-reviewed

    HS Kim, M Nisizawa, T Itoh, Uchida, I

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 72 (7) 1643-1646 1999/07

    DOI: 10.1246/bcsj.72.1643  

    ISSN: 0009-2673

    eISSN: 1348-0634

  216. Electrochemical quartz crystal microbalance for insertion/extraction of lithium in spinel LiMn2O4 thin films Peer-reviewed

    M Nishizawa, T Uchiyama, T Itoh, T Abe, Uchida, I

    LANGMUIR 15 (15) 4949-4951 1999/07

    DOI: 10.1021/la990270z  

    ISSN: 0743-7463

  217. Ion- and electron-transport properties of a single particle of disordered carbon during the lithium insertion reaction Peer-reviewed

    M Nishizawa, H Koshika, R Hashitani, T Itoh, T Abe, Uchida, I

    JOURNAL OF PHYSICAL CHEMISTRY B 103 (24) 4933-4936 1999/06

    DOI: 10.1021/jp990604t  

    ISSN: 1089-5647

  218. Microelectrode-based characterization systems: Application to lithium ion battery materials Peer-reviewed

    M Nishizawa, Uchida, I

    ELECTROCHEMISTRY 67 (5) 420-426 1999/05

    ISSN: 1344-3542

  219. Effects of surface charges and surface states of chemically modified cadmium sulfide nanoparticles immobilized to gold electrode substrate on photoinduced charge transfers Peer-reviewed

    M Miyake, T Torimoto, M Nishizawa, T Sakata, H Mori, H Yoneyama

    LANGMUIR 15 (8) 2714-2718 1999/04

    DOI: 10.1021/la9807762  

    ISSN: 0743-7463

  220. Preparation and photoelectrochemical properties of two-dimensionally organized CdS nanoparticle thin films Peer-reviewed

    T Torimoto, N Tsumura, M Miyake, M Nishizawa, T Sakata, H Mori, H Yoneyama

    LANGMUIR 15 (5) 1853-1858 1999/03

    DOI: 10.1021/la9811721  

    ISSN: 0743-7463

  221. Chronoamperometric Studies of LiCoO2 and LiNiO2 Particles during Lithium-Ion Insertion/Extraction

    K. Dokko, S. Horikoshi, M. Nishizawa, T. Itoh, T. Abe, I. Uchida

    The Electrochemical Society Proceedings 99 (25) 290-297 1999

    Publisher: ELECTROCHEMICAL SOCIETY INC

  222. Fabrication of mesophase pitch carbon thin film electrodes and the effect of heat treatment on electrochemical lithium insertion and extraction Peer-reviewed

    SJ Lee, M Nishizawa, Uchida, I

    ELECTROCHIMICA ACTA 44 (14) 2379-2383 1999

    DOI: 10.1016/S0013-4686(98)00373-9  

    ISSN: 0013-4686

  223. Microelectrode-based characterization systems for advanced materials in battery and sensor applications Peer-reviewed

    M Nishizawa, Uchida, I

    ELECTROCHIMICA ACTA 44 (21-22) 3629-3637 1999

    DOI: 10.1016/S0013-4686(99)00066-3  

    ISSN: 0013-4686

  224. Microelectrode techniques for in situ measurements on electrical conductance of a carbon particle and its composite film during electrochemical lithium insertion/extraction Peer-reviewed

    M Nishizawa, H Koshika, Uchida, I

    JOURNAL OF PHYSICAL CHEMISTRY B 103 (1) 192-196 1999/01

    DOI: 10.1021/jp983454f  

    ISSN: 1089-5647

  225. Single particle electrochemistry for hydrogen storage alloys, MmNi(3.55)Co(0.75)Mn(0.4)Al(0.3) Peer-reviewed

    HS Kim, M Nishizawa, Uchida, I

    ELECTROCHIMICA ACTA 45 (3) 483-488 1999

    DOI: 10.1016/S0013-4686(99)00269-8  

    ISSN: 0013-4686

  226. Electrochemical insertion behavior of lithium ions into mesophase pitch carbon films prepared by electrostatic spray deposition Peer-reviewed

    SJ Lee, T Itoh, M Nishizawa, K Yamada, Uchida, I

    DENKI KAGAKU 66 (12) 1276-1280 1998/12

    ISSN: 0366-9297

  227. High resolution cyclic voltammograms of LiMn2-x NixO4 with a microelectrode technique Peer-reviewed

    K Dokko, M Nishizawa, Uchida, I

    DENKI KAGAKU 66 (12) 1188-1193 1998/12

    ISSN: 0366-9297

  228. Photoelectrochemical properties of size-quantized CdS thin films prepared by an electrochemical method Peer-reviewed

    T Torimoto, S Nagakubo, M Nishizawa, H Yoneyama

    LANGMUIR 14 (25) 7077-7081 1998/12

    DOI: 10.1021/la980364t  

    ISSN: 0743-7463

  229. Electrochemical studies of spinel LiMn2O4 films prepared by electrostatic spray deposition Peer-reviewed

    M Nishizawa, T Uchiyama, K Dokko, K Yamada, T Matsue, Uchida, I

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 71 (8) 2011-2015 1998/08

    DOI: 10.1246/bcsj.71.2011  

    ISSN: 0009-2673

    eISSN: 1348-0634

  230. Irreversible conductivity change of Li1-xCoO2 on electrochemical lithium insertion/extraction, desirable for battery applications Peer-reviewed

    M Nishizawa, S Yamamura, T Itoh, Uchida, I

    CHEMICAL COMMUNICATIONS 16 (16) 1631-1632 1998/08

    DOI: 10.1039/a802962h  

    ISSN: 1359-7345

  231. In situ conductivity measurements of LiMn2O4 thin films during lithium insertion/extraction by using interdigitated microarray electrodes Peer-reviewed

    S Yamamura, H Koshika, M Nishizawa, T Matsue, Uchida, I

    JOURNAL OF SOLID STATE ELECTROCHEMISTRY 2 (4) 211-215 1998/07

    DOI: 10.1007/s100080050090  

    ISSN: 1432-8488

  232. Measurements of chemical diffusion coefficient of lithium ion in graphitized mesocarbon microbeads using a microelectrode Peer-reviewed

    M Nishizawa, R Hashitani, T Itoh, T Matsue, Uchida, I

    ELECTROCHEMICAL AND SOLID STATE LETTERS 1 (1) 10-12 1998/07

    ISSN: 1099-0062

  233. Photo-assisted lithium insertion to Li1-XMn2O4 film electrodes Peer-reviewed

    S Yamamura, H Koshika, M Nishizawa, T Matsue, Uchida, I

    CHEMISTRY LETTERS (6) 495-496 1998/06

    DOI: 10.1246/cl.1998.495  

    ISSN: 0366-7022

    eISSN: 1348-0715

  234. Underpotential deposition of silver onto gold substrates covered with self-assembled monolayers of alkanethiols to induce intervention of the silver between the monolayer and the gold substrate Peer-reviewed

    D Oyamatsu, M Nishizawa, S Kuwabata, H Yoneyama

    LANGMUIR 14 (12) 3298-3302 1998/06

    DOI: 10.1021/la970984e  

    ISSN: 0743-7463

  235. Underpotential deposition of copper on gold electrodes through self-assembled monolayers of propanethiol Peer-reviewed

    M Nishizawa, T Sunagawa, H Yoneyama

    LANGMUIR 13 (20) 5215-5217 1997/10

    DOI: 10.1021/la970545f  

    ISSN: 0743-7463

  236. Selective desorption of 3-mercaptopropionic acid from a mixed monolayer with hexadecanethiol assembled on a gold electrode Peer-reviewed

    M Nishizawa, T Sunagawa, H Yoneyama

    JOURNAL OF ELECTROANALYTICAL CHEMISTRY 436 (1-2) 213-218 1997/10

    DOI: 10.1016/S0022-0728(97)00329-X  

    ISSN: 0022-0728

  237. Template synthesis of polypyrrole-coated spinel LiMn2O4 nanotubules and their properties as cathode active materials for lithium batteries Peer-reviewed

    M Nishizawa, K Mukai, S Kuwabata, CR Martin, H Yoneyama

    JOURNAL OF THE ELECTROCHEMICAL SOCIETY 144 (6) 1923-1927 1997/06

    DOI: 10.1149/1.1837722  

    ISSN: 0013-4651

  238. Characterization of covalently immobilized Q-CdS particles on Au(111) by scanning tunneling microscopy and tunneling spectroscopy with high reproducibility Peer-reviewed

    M Miyake, H Matsumoto, M Nishizawa, T Sakata, H Mori, S Kuwabata, H Yoneyama

    LANGMUIR 13 (4) 742-746 1997/02

    DOI: 10.1021/la960702v  

    ISSN: 0743-7463

  239. Photoimage formation in a TiO2 particle-incorporated prussian blue film Peer-reviewed

    M Nishizawa, S Kuwabata, H Yoneyama

    JOURNAL OF THE ELECTROCHEMICAL SOCIETY 143 (11) 3462-3465 1996/11

    ISSN: 0013-4651

  240. Microarray Electrode-Based Microsensors

    NISHIZAWA Matsuhiko, MATSUE Tomokazu, UCHIDA Isamu

    Jitsumu Hyomen Gijutsu 46 (9) 789-793 1995/09/01

    Publisher: The Surface Finishing Society of Japan

    DOI: 10.4139/sfj.46.789  

    ISSN: 0915-1869

  241. DEVELOPMENT OF CONDUCTOMETRIC ENZYME SENSORS USING MICROARRAY ELECTRODES Peer-reviewed

    T MATSUE, M NISHIZAWA, UCHIDA, I

    NIPPON KAGAKU KAISHI (7) 493-501 1995/07

    ISSN: 0369-4577

  242. Photyomemory Behavior of Microarray Electrode Coated with Polypyrrole Film Peer-reviewed

    M. Shibuya, M. Nishizawa, T. Matsue, I. Uchida

    Hyomen Gijutsu 46 (7) 659-662 1995/07

    Publisher: The Surface Finishing Society of Japan

    DOI: 10.4139/sfj.46.659  

    ISSN: 0915-1869

    More details Close

    We fabricated an electrochemical photo memory device using a Pt-TiO2-Pt microarray electrode coated with a polypyrrole film. The TiO2 microband electrode, positioned between two comb-shaped Pt electrodes, was an n-type semiconductor to oxidize the polypyrrole film under light irradiation. Because oxidation enhances the conductivity of polypyrrole, light irradiation is detected by the increase in the conductivity of polypyrrole between the two Pt comb electrodes. Enhanced conductivity remained even after light irradiation was terminated. This photo memory behavior was observed when the potential of the titanium oxide electrode was set to -0.3V vs. SCE.

  243. METAL NANOTUBULE MEMBRANES WITH ELECTROCHEMICALLY SWITCHABLE ION-TRANSPORT SELECTIVITY Peer-reviewed

    M NISHIZAWA, VP MENON, CR MARTIN

    SCIENCE 268 (5211) 700-702 1995/05

    DOI: 10.1126/science.268.5211.700  

    ISSN: 0036-8075

  244. ELECTROCATALYTIC OXIDATION OF ALCOHOL AT A POLYPYRROLE DIAPHRAGM ELECTRODE COATED WITH DIAPHORASE AND ALCOHOL-DEHYDROGENASE Peer-reviewed

    Y MIWA, M NISHIZAWA, T MATSUE, UCHIDA, I

    DENKI KAGAKU 62 (12) 1256-1257 1994/12

    ISSN: 0366-9297

  245. ELECTROCHEMICAL IN-SITU CONDUCTIVITY MEASUREMENT OF C-60 FILMS IN ACETONITRILE CONTAINING M(BPY)(3)(2+) (M=FE, NI, RU, OR OS) Peer-reviewed

    M NISHIZAWA, K TOMURA, T MATSUE, UCHIDA, I

    JOURNAL OF ELECTROANALYTICAL CHEMISTRY 379 (1-2) 233-237 1994/12

    DOI: 10.1016/0022-0728(94)87143-4  

    ISSN: 0022-0728

  246. A CONDUCTOMETRIC GLUCOSE SENSOR-BASED ON A TWIN-MICROBAND ELECTRODE COATED WITH A POLYANILINE THIN-FILM Peer-reviewed

    Y MIWA, M NISHIZAWA, T MATSUE, UCHIDA, I

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 67 (10) 2864-2866 1994/10

    DOI: 10.1246/bcsj.67.2864  

    ISSN: 0009-2673

    eISSN: 1348-0634

  247. CRYSTALLOGRAPHIC CHANGES OF C-60 FILM INDUCED BY ELECTROCHEMICAL DOPING OF TETRA-N-BUTYLAMMONIUM IONS Peer-reviewed

    K TOMURA, M NISHIZAWA, D TAKEMURA, T MATSUE, UCHIDA, I

    CHEMISTRY LETTERS (8) 1365-1368 1994/08

    DOI: 10.1246/cl.1994.1365  

    ISSN: 0366-7022

    eISSN: 1348-0715

  248. ULTRATHIN POLYPYRROLE FORMED AT A TWIN-MICROBAND ELECTRODE IN THE PRESENCE OF DODECYL-SULFATE Peer-reviewed

    M NISHIZAWA, Y MIWA, T MATSUE, UCHIDA, I

    JOURNAL OF ELECTROANALYTICAL CHEMISTRY 371 (1-2) 273-275 1994/06

    DOI: 10.1016/0022-0728(93)03217-D  

    ISSN: 1572-6657

    eISSN: 1873-2569

  249. ELECTROCHEMICAL IN-SITU CONDUCTIVITY MEASUREMENTS OF C-60 THIN-FILMS Peer-reviewed

    M NISHIZAWA, T MATSUE, UCHIDA, I

    JOURNAL OF ELECTROANALYTICAL CHEMISTRY 353 (1-2) 329-334 1993/07

    ISSN: 0022-0728

  250. SURFACE PRETREATMENT FOR ELECTROCHEMICAL FABRICATION OF ULTRATHIN PATTERNED CONDUCTING POLYMERS Peer-reviewed

    M NISHIZAWA, Y MIWA, T MATSUE, UCHIDA, I

    JOURNAL OF THE ELECTROCHEMICAL SOCIETY 140 (6) 1650-1655 1993/06

    DOI: 10.1149/1.2221617  

    ISSN: 0013-4651

  251. FABRICATION OF A PH-SENSITIVE MICROARRAY ELECTRODE AND APPLICABILITY TO BIOSENSORS Peer-reviewed

    M NISHIZAWA, T MATSUE, UCHIDA, I

    SENSORS AND ACTUATORS B-CHEMICAL 13 (1-3) 53-56 1993/05

    DOI: 10.1016/0925-4005(93)85321-Z  

    ISSN: 0925-4005

  252. Fabrication of Enzyme Switches Peer-reviewed

    T. Matsue, M. Nishizawa, I. Uchida

    BCL 59 8-11 1993

  253. PHOTO-SWITCHING BEHAVIOR OF MICROARRAY ELECTRODES COATED WITH POLYPYRROLE FILM Peer-reviewed

    M SHIBUYA, M NISHIZAWA, T MATSUE, UCHIDA, I

    DENKI KAGAKU 60 (12) 1152-1153 1992/12

    ISSN: 0366-9297

  254. PENICILLIN SENSOR BASED ON A MICROARRAY ELECTRODE COATED WITH PH-RESPONSIVE POLYPYRROLE Peer-reviewed

    M NISHIZAWA, T MATSUE, UCHIDA, I

    ANALYTICAL CHEMISTRY 64 (21) 2642-2644 1992/11

    DOI: 10.1021/ac00045a030  

    ISSN: 0003-2700

  255. pH-Response on a Polyprrrole-Coated Microarray Electrode Peer-reviewed

    M. Nishizawa, T. Osawa, T. Matsue, I. Uchida

    Denki Kagaku 60 1014-1015 1992

  256. ELECTROCHEMICAL PREPARATION OF ULTRATHIN POLYPYRROLE FILM AT MICROARRAY ELECTRODES Peer-reviewed

    M NISHIZAWA, M SHIBUYA, T SAWAGUCHI, T MATSUE, UCHIDA, I

    JOURNAL OF PHYSICAL CHEMISTRY 95 (23) 9042-9044 1991/11

    DOI: 10.1021/j100176a007  

    ISSN: 0022-3654

  257. INSITU CHARACTERIZATION OF COPOLYMERS OF PYRROLE AND N-METHYLPYRROLE AT MICROARRAY ELECTRODES Peer-reviewed

    M NISHIZAWA, T SAWAGUCHI, T MATSUE, UCHIDA, I

    SYNTHETIC METALS 45 (2) 241-248 1991/11

    DOI: 10.1016/0379-6779(91)91809-O  

    ISSN: 0379-6779

  258. AN ENZYME SWITCH SENSITIVE TO NADH Peer-reviewed

    T MATSUE, M NISHIZAWA, T SAWAGUCHI, UCHIDA, I

    JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS 15 (15) 1029-1031 1991/08

    DOI: 10.1039/c39910001029  

    ISSN: 0022-4936

  259. ELECTRON-TRANSFER FROM NADH DEHYDROGENASE TO POLYPYRROLE AND ITS APPLICABILITY TO ELECTROCHEMICAL OXIDATION OF NADH Peer-reviewed

    T MATSUE, N KASAI, M NARUMI, M NISHIZAWA, H YAMADA, UCHIDA, I

    JOURNAL OF ELECTROANALYTICAL CHEMISTRY 300 (1-2) 111-118 1991/02

    DOI: 10.1016/0022-0728(91)85387-5  

    ISSN: 0022-0728

  260. STABILIZATION OF STEARIC-ACID LB MONOLAYER FILM BY ADDITION OF N-ALKYLTHIOL Peer-reviewed

    T SAWAGUCHI, M NISHIZAWA, T MATSUE, UCHIDA, I

    CHEMISTRY LETTERS (8) 1437-1440 1990/08

    DOI: 10.1246/cl.1990.1437  

    ISSN: 0366-7022

    eISSN: 1348-0715

Show all ︎Show first 5

Misc. 91

  1. てんかん診療の近未来〜デバイスと医薬品開発の最前線〜 ハイドロゲル-有機物を基材とする新規頭蓋内電極の開発

    大沢 伸一郎, 西澤 松彦, 中川 敦寛, 岩崎 真樹, 鈴木 泰汎, 下田 由輝, 中里 信和, 冨永 悌二

    てんかん研究 40 (2) 309-309 2022/08

    Publisher: (一社)日本てんかん学会

    ISSN: 0912-0890

    eISSN: 1347-5509

  2. Drug delivery devices for retinal diseases

    Hirokazu Kaji, Nobuhiro Nagai, Matsuhiko Nishizawa, Toshiaki Abe

    Advanced Drug Delivery Reviews 128 148-157 2018/03/15

    Publisher: Elsevier B.V.

    DOI: 10.1016/j.addr.2017.07.002  

    ISSN: 1872-8294 0169-409X

  3. Minimally-invasive transepidermal potentiometry with microneedle salt bridge for evaluation of the skin barrier repair Peer-reviewed

    Yuina Abe, Kuniaki Nagamine, Mayu Nakabayashi, Hiroyuki Kai, Takeshi Yamauchi, Kenshi Yamasaki, Matsuhiko Nishizawa

    Journal of Dermatological Science 86 (2) e48 2017/05

    Publisher: Elsevier {BV}

    DOI: 10.1016/j.jdermsci.2017.02.140  

    ISSN: 0923-1811

  4. Transdermal Electric Devices Driven by Biofuel Cell Invited

    NISHIZAWA Matsuhiko

    86 (4) 315-319 2017/04

    Publisher: 応用物理学会

    ISSN: 0369-8009

  5. Protective Effects of Sustained Unoprostone Release Device in Rhodopsin Pro347Leu Transgenic Rabbits

    Nobuhiro Nagai, Yasuko Izumida, Hirokazu Kai, Matsuhiko Nishizawa, Aya Katsuyama, Shinji Yamada, Toru Nakazawa, Mineo Kondo, Hiroko Terasaki, Yukihiko Mashima, Toshiaki Abe

    INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE 57 (12) 2016/09

    ISSN: 0146-0404

    eISSN: 1552-5783

  6. Wearable Biofuel Cells Invited

    NISHIZAWA Matsuhiko

    Electrochemistry 84 (3) 173-177 2016/03

    Publisher: 公益社団法人 電気化学会

    DOI: 10.5796/electrochemistry.84.173  

    ISSN: 1344-3542

  7. 2G45 Development of the Stretchable Electrode-Hydrogel Hybrid Sheet for Biological Applications

    NAGAMINE Kuniaki, CHIHARA Shun, OKABE Taiki, KAI Hiroyuki, KAJI Hirokazu, NISHIZAWA Matsuhiko

    2016 (28) "2G45-1"-"2G45-3" 2016/01/09

    Publisher: The Japan Society of Mechanical Engineers

    More details Close

    Hydrogel-based, molecular permeable electronic devices are considered to be promising for electrical stimulation and recording of living tissues, either in vivo or in vitro. This study reports the fabrication of the hydrogel-based devices that remain highly electrically conductive under substantial stretch and bending. Using a simple technique involving a combination of chemical polymerization and electropolymerization of poly (3,4-ethylenedioxythiophene) (PEDOT), a tight bonding of a conductive composite of PEDOT and polyurethane (PU) to an elastic double-network hydrogel is achieved to make fully organic PEDOT/PU-hydrogel hybrids. Their response to repeated mechanical stretching, hydration-drying cycles, and autoclaving is assessed, demonstrating excellent stability, without any mechanical or electrical damage. The adhesion, proliferation, and differentiation of neural and muscle cells cultured on these hybrids are demonstrated, advancing the field of tissue engineering with integrated electronics.

  8. Development of Diagnostic and Therapeutic Electrical Device for Skin Barrier Function

    Yuina ABE, Kuniaki NAGAMINE, Mayu NAKABAYASHI, Hiroyuki KAI, Takeshi YAMAUCHI, Kenshi YAMASAKI, Matsuhiko NISHIZAWA

    The Proceedings of the JSME Conference on Frontiers in Bioengineering 2016.27 (0) B113 2016

    Publisher: Japan Society of Mechanical Engineers

    DOI: 10.1299/jsmebiofro.2016.27.b113  

    ISSN: 2424-2810

  9. Pharmacokinetic and Safety Evaluation of a Transscleral Sustained Unoprostone Release Device

    Nobuhiro Nagai, Yasuko Izumida, Eri Koyanagi, Hirokazu Kaji, Matsuhiko Nishizawa, Takahito Imagawa, Akiko Morikawa, Toru Nakazawa, Yukihiko Mashima, Toshiaki Abe

    INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE 56 (7) 2015/06

    ISSN: 0146-0404

    eISSN: 1552-5783

  10. ABCT-1-7 Enzyme-Based Fuel Cell Devices

    Nishizawa Matsuhiko

    Proceedings of the IEICE General Conference 2015 (2) "SS-71" 2015/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

  11. Enzymatic Batteries

    西澤松彦

    応用物理 83 (10) 839-841 2014/10

    Publisher: 応用物理学会

    ISSN: 0369-8009

  12. 筋細胞アッセイのためのハイドロゲルデバイスの開発

    岡本滉平, 島崎立彬, 長峯邦明, 梶弘和, 神崎展, 西澤松彦

    電気化学秋季大会講演要旨集 2014 211 2014/09/27

  13. Micropatterned polymeric nanosheets for local injection of an engineered epithelial monolayer

    Toshinori Fujie, Yoshihiro Mori, Matsuhiko Nishizawa, Nobuhiro Nagai, Toshiaki Abe, Ali Khademhosseini, Hirokazu Kaji

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY 248 2014/08

    ISSN: 0065-7727

  14. ハイドロゲル間接着法による筋細胞電気刺激デバイスの構築

    長峯邦明, 岡本滉平, 梶弘和, 神崎展, 西澤松彦

    電気化学会大会講演要旨集 81st 237 2014/03/29

  15. 高伸縮性ハイドロゲル電極の開発と応用

    島崎立彬, 千原駿, 岡部大輝, 長峯邦明, 藪浩, 梶弘和, 西澤松彦

    電気化学秋季大会講演要旨集 2014 2014

  16. 柔らかい酵素電池

    三宅丈雄, 小川雄大, 西澤松彦

    表面科学 35 (7) 365-370 2014

    DOI: 10.1380/jsssj.35.365  

  17. ハイドロゲル間接着技術を用いた筋細胞アッセイデバイスの構築

    岡本滉平, 長峯邦明, 梶弘和, 神崎展, 西澤松彦

    化学とマイクロ・ナノシステム学会研究会講演要旨集 28th 15 2013/12/05

  18. SENSOR MOLECULE‐FUNCTIONALIZED HYDROGEL SHEET FOR METABOLISM ASSAY OF SKELETAL MUSCLE CELLS

    長峯邦明, 岡本滉平, 梶弘和, 神崎展, 西澤松彦

    Chemical Sensors 29 (Supplement B) 58-60 2013/09/27

  19. 筋細胞パターンゲルを用いた細胞の代謝活性計測

    岡本滉平, 伊藤俊太郎, 長峯邦明, 梶弘和, 神崎展, 西澤松彦

    化学とマイクロ・ナノシステム学会研究会講演要旨集 27th 63 2013/05/23

  20. センサ分子修飾ハイドロゲルによる筋細胞分泌物の計測

    長峯邦明, 岡本滉平, 梶弘和, 神崎展, 西澤松彦

    電気化学会大会講演要旨集 80th 279 2013/03/29

  21. 筋細胞パターンゲルを用いた細胞の代謝活性センシング

    岡本滉平, 長峯邦明, 梶弘和, 神崎展, 西澤松彦

    電気化学会大会講演要旨集 80th 458 2013/03/29

  22. SENSOR MOLECULE‐FUNCTIONALIZED HYDROGEL SHEET FOR METABOLITE SECRETION ASSAY OF SKELETAL MUSCLE CELLS

    長峯邦明, 岡本滉平, 梶弘和, 神崎展, 西澤松彦

    Chemical Sensors 29 (Supplement A) 147-149 2013/03/29

    Publisher: 電気化学会化学センサ研究会

  23. 179 Cnducting polymer microelectrodes anchored to hydrogel films and its electrical applications

    SASAKI Masato, Takahashi Daisuke, NAGAMINE Kuniaki, MIYAKE Takeo, KAJI Hirokazu, NISHIZAWA Matsuhiko

    2013 (48) 160-160 2013/03/15

    Publisher: The Japan Society of Mechanical Engineers

  24. 189 Flexible, miniature biofuel cell

    OFUJI Takuya, YOSHINO Shuhei, KATO Koichiro, MIYAKE Takeo, KAJI Hirokazu, NISHIZAWA Matsuhiko

    2013 (48) 180-180 2013/03/15

    Publisher: The Japan Society of Mechanical Engineers

  25. Device technologies for electrical power generation from biochemical resources

    Takeo Miyake, Matsuhiko Nishizawa

    IEEJ Transactions on Sensors and Micromachines 133 (9) 242-247 2013

    DOI: 10.1541/ieejsmas.133.242  

    ISSN: 1341-8939 1347-5525

  26. Enzyme-Nanotube Composite Films and Their Application to Biofuel Cells

    11 (1) 31-34 2012/10

    Publisher: ナノ学会

    ISSN: 1347-8028

  27. ハイドロゲルを用いた骨格筋細胞アッセイ系の開発

    長峯邦明, 大谷真吾, 伊藤俊太郎, 梶弘和, 神崎展, 西澤松彦

    化学系学協会東北大会プログラムおよび講演予稿集 2012 138 2012/09/15

  28. センサ微粒子パターンゲルを用いた細胞の代謝活性イメージング

    長峯邦明, 大谷真吾, 伊藤俊太郎, 神崎展, 西澤松彦

    電気化学会大会講演要旨集 79th 47 2012/03/29

  29. 酵素電極フィルムの開発〈貼ればバイオ発電〉

    吉野修平, 三宅丈雄, 西澤松彦

    プラスチックス 63 (3) 1-4 2012

    Publisher: 日本工業出版

    ISSN: 0555-7887

  30. 小型酵素電池の最前線

    三宅丈雄, 西澤松彦

    化学と工業 2012

    Publisher: 日本化学会

  31. 電池マテリアルとして期待される「発電酵素」

    三宅丈雄, 西澤松彦

    Material Stage 12 (10) 20-23 2012

    Publisher: 技術情報協会

    ISSN: 1346-3926

  32. ハイドロゲルを用いた細胞培養法の開発

    大谷真吾, 武田舞, 三宅丈雄, 長峯邦明, 神崎展, 西澤松彦

    化学系学協会東北大会プログラムおよび講演予稿集 2011 191 2011/09/17

  33. 筋肉細胞アッセイゲルシートの構築と評価

    長峯邦明, 武田舞, 大谷真吾, 神崎展, 西澤松彦

    電気化学秋季大会講演要旨集 2011 117 2011/09/09

  34. ハイドロゲルを基板とする筋肉細胞アッセイシステムの構築と評価

    長峯邦明, 武田舞, 大谷真吾, 神崎展, 西澤松彦

    電気化学会大会講演要旨集 78th(CD-ROM) ROMBUNNO.1D08 2011/03/29

  35. 環境・生体に優しいバイオ燃料電池

    三宅丈雄, 吉野修平, 西澤松彦

    静電気学会誌 2011

  36. 収縮活動可能な培養筋管細胞系の構築とその代謝研究への応用

    神崎 展, 長峯邦明, 西澤松彦

    内分泌・糖尿病・代謝内科( 31 (5) 325-328 2010/12

    Publisher: 科学評論社

  37. ゲルシート培養法を用いた神経・筋マイクロパターン共培養系の構築

    武田舞, 大谷真吾, 長峯邦明, 三宅丈雄, 神崎展, 西澤松彦

    化学とマイクロ・ナノシステム研究会講演要旨集 22nd 30 2010/11/17

  38. Metabolic Assay System for Micropatterned Contractile Myotubes

    Nagamine K, Ido Y, Sekine S, Miyake T, Kanzaki M, Nishizawa M

    ECS Transactions 33 (8) 35-39 2010/10

    Publisher: The Electrochemical Society

    DOI: 10.1149/1.3484104  

  39. ゲル培養法を用いた収縮型筋管細胞の代謝活性計測

    長峯邦明, 梶弘和, 神崎展, 西澤松彦

    電気化学秋季大会講演要旨集 2010 147 2010/09/02

  40. 多角バレルスパッタリング法を利用した低環境負荷操作による収縮型筋管細胞培養系の構築

    長峯邦明, 梶弘和, 神崎展, 西澤松彦, 阿部孝之

    電気化学会大会講演要旨集 77th 382 2010/03/26

  41. バイオ電池の最新開発動向

    三宅丈雄, 西澤松彦

    Semiconductor PDF World 29 48-49 2010

  42. Cultivation and Application of Contractile Muscle Cells

    M. Kanzaki, K. Nagamine, M. Nishizawa

    incretion, diabetes, metabolism 31 464-471 2010

  43. バイオ燃料電池

    三宅丈雄, 西澤松彦

    電子情報通信学会「知識ベース」 S2-7-3-1-12 2010

  44. ゲルシート培養法で筋肉細胞の収縮運動を長期維持

    長峯邦明, 西澤松

    未来材料 10 (10) 2-5 2010

    Publisher: エヌ・ティー・エス

    ISSN: 1346-0986

  45. バイオ材料とデバイス技術の融合

    西澤松彦

    現代化学 (8) 44-48 2010

    Publisher: 東京化学同人

    ISSN: 0386-961X

  46. 局所電気刺激を用いた培養筋管細胞のグルコース代謝活性に関する研究

    石橋毅之, 長峰邦明, 梶弘和, 神崎展, 佐藤正明, 西澤松彦

    電気化学秋季大会講演要旨集 2009 107 2009/09/10

  47. 収縮型筋管細胞アレイの3次元ゲル培養系の構築

    長峯邦明, 石橋毅之, 川島丈明, 梶弘和, 安部隆, 神崎展, 西澤松彦

    電気化学秋季大会講演要旨集 2009 94 2009/09/10

  48. インスリン応答性アッセイに向けた3次元培養筋管細胞モデルの検討

    川島丈明, 横井丈誌, 梶弘和, 安部隆, 神崎展, 西澤松彦

    電気化学会大会講演要旨集 76th 289 2009/03/29

  49. 培養骨格筋細胞の高効率培養システムの検討

    石橋毅之, 星野佑, 梶弘和, 安部隆, 神崎展, 佐藤正明, 西澤松彦

    電気化学会大会講演要旨集 76th 290 2009/03/29

  50. Electrochemical biolithography-based microfluidic biochip system

    Proceedings of the Chemical Sensor Symposium 47 106-108 2009/03

    Publisher: 電気化学会化学センサ研究会

  51. グルコースを燃料とするバイオ燃料電池の開発

    三宅 丈雄, 安部 隆, 西澤 松彦

    ナノ医工学年報 3 (1) 35-44 2009

    Publisher: 東北大学グローバルCOEプログラム「新世紀世界の成長焦点に築くナノ医工学拠点」

    ISSN: 1882-4692

  52. 酵素燃料電池の新潮流

    都甲真, 西澤松彦

    酵素工学ニュース 59 16-20 2009

    Publisher: 酵素工学会

  53. バイオ燃料電池マイクロシステムと体液発電への取り組み

    西澤松彦

    Electrochemistry 76 (12) 916-919 2008/12

    Publisher: 電気化学会

    DOI: 10.5796/electrochemistry.76.916  

    ISSN: 1344-3542

  54. Integration of Electrochemical Biolithography Technique into an AFM System

    KAJI Hirokazu, SEKINE Soichiro, NISHIZAWA Matsuhiko

    2008 (6) 43-46 2008/06/12

  55. Surface Modification with Electrically Conducting Polymers as a Cell Interfacing Material

    KAMIYA Takashi, KAJI Hirokazu, ABE Takashi, NISHIZAWA Matsuhiko

    2008 (6) 37-41 2008/06/12

  56. Vertical Electrical Pulse Stimulation to Skeletal Muscle Cells

    石橋毅之, 星野佑, 梶弘和, 神崎展, 安部隆, 西澤松彦

    電気学会バイオ・マイクロシステム研究会資料 BMS-08 (6-15) 47-50 2008/06/12

  57. 培養筋管細胞の収縮能を発揮させる基板に関する研究

    星野佑, 石橋毅之, 神谷崇志, 梶弘和, 神崎展, 西澤松彦

    化学とマイクロ・ナノシステム研究会講演要旨集 17th 14 2008/05/20

  58. 培養筋管細胞への均一な電気刺激の検討

    石橋毅之, 星野佑, 梶弘和, 神崎展, 安部隆, 西澤松彦

    電気化学会大会講演要旨集 75th 184 2008/03/29

  59. In-situリソグラフィーによるバイオチップ表面の動的制御

    梶弘和, 川島丈明, 関根宗一郎, 西澤松彦

    表面技術 59 (6) 371-376 2008

    Publisher: The Surface Finishing Society of Japan

    DOI: 10.4139/sfj.59.371  

    ISSN: 0915-1869

  60. 細胞操作・センシングのためのバイオリソグラフィー

    西澤松彦

    マテリアルインテグレーション 21 (5) 264-268 2008

    Publisher: ティー・アイ・シィー

    ISSN: 1344-7858

  61. 隔膜型培養基板用いた筋管細胞への電気刺激

    星野佑, 石橋毅之, 梶弘和, 神崎展, 安部隆, 西澤松彦

    化学とマイクロ・ナノシステム研究会講演要旨集 16th 58 2007/10/29

  62. 隔膜型培養基板を用いた骨格筋細胞への局所電気刺激

    石橋毅之, 星野佑, 梶弘和, 神崎展, 安部隆, 西澤松彦

    電気化学秋季大会講演要旨集 2007 179 2007/09/19

  63. 隔膜型培養基板を用いた骨格筋細胞への局所電気刺激

    石橋毅之, 星野佑, 梶弘和, 神崎展, 安部隆, 西澤松彦

    生体機能関連化学シンポジウム講演要旨集 22nd 244-245 2007/09/10

  64. Surface Modification of Polypyrrole-Coated Electrodes and its Application to Cell Stimulation Electrodes

    KITAZUME Takahiro, KAMIYA Takashi, KAJI Hirokazu, ABE Takashi, NISHIZAWA Matsuhiko

    2007 (7) 19-23 2007/07/02

  65. A study of enzyme-based microfluidic biofuel cell

    ASAI Tatsuya, TOGO Makoto, TAKAMURA Akimasa, KAJI Hirokazu, ABE Takashi, NISHIZAWA Matsuhiko

    2007 (7) 111-114 2007/07/02

  66. バイオリソグラフィーのセンサ応用

    西澤松彦

    化学センサ 23 101-108 2007

  67. ナノテクがむすぶ生命と機械

    西澤松彦

    青葉工業会報 51 22-24 2007

  68. Amperometric nitric oxide microsensor using two-dimensional cross-linked Langmuir-Blodgett films of polysiloxane copolymer (vol 108, pg 384, 2005)

    D Kato, M Kunitake, M Nishizawa, T Matsue, F Mizutani

    SENSORS AND ACTUATORS B-CHEMICAL 115 (1) 560-560 2006/05

    ISSN: 0925-4005

  69. Fabrication and Characterization of Conducting Polymer Thin Films as a Biointerfacing Material

    KAJI Hirokazu, KOBAYASHI Noriyuki, NOZAKI Hyuma, KITADUME Takahiro, NISHIZAWA Matsuhiko

    2006 (1) 95-98 2006/04/21

  70. バイオ燃料電池--生体や環境に溶け込む安全電源--

    西澤松彦

    化学と工業 768-771 2006

  71. バイオリソグラフィー:界面分子制御と細胞操作

    梶弘和, 西澤松彦

    Electrochemistry 74 (11) 905-910 2006

    Publisher: The Electrochemical Society of Japan

    DOI: 10.5796/electrochemistry.74.905  

    ISSN: 1344-3542

  72. バイオ燃料電池の高性能化に向けた電極表面および電極形状のナノ・マイクロ加工

    佐藤冬樹, 都甲真, 西澤松彦

    エコインダストリー 3 (4) 46-52 2005

    Publisher: シーエムシー出版

    ISSN: 1342-3037

  73. バイオリソグラフィー技術の最新動向

    梶弘和, 西澤松彦

    機械の研究 57 (10) 1027-1034 2005

    Publisher: 養賢堂

    ISSN: 0368-5713

  74. バイオマイクロ燃料電池の開発動向

    都甲真, 西澤松彦

    M&E 120-122 2005

  75. ビタミンK3ポリマーとバイオ燃料電池-体液発電への取り組み-

    都甲真, 西澤松彦

    燃料電池 5 (2) 26-29 2005

    Publisher: 燃料電池開発情報センター

    ISSN: 1346-6623

  76. 体内エネルギー変換に学ぶバイオニック燃料電池

    西澤松彦

    機会学会誌 108 (1045) 932-933 2005

    Publisher: The Japan Society of Mechanical Engineers

    ISSN: 0021-4728

  77. バイオチップ表面への細胞のマイクロパターニング

    西澤松彦, 梶弘和, 田光公康, 末永智一

    表面科学 25 (5) 290-295 2004

    Publisher: The Surface Science Society of Japan

    DOI: 10.1380/jsssj.25.290  

    ISSN: 0388-5321

    More details Close

    Recent progress in understanding molecular mechanism of cell adhesion has prompted researches for designing interfaces to regulate cell adhesion in μm scale. Such cellular micropatterning has been extensively attempted by a number of research groups, since the spatial control of cellular adhesion and growth is a critical issue in many areas of biotechnology such as tissue engineering, cell-based bioanalysis and bioelectronics. We report herein our recent results on 1) the development of techniques for cellular micropatterning and 2) the characterization of the functions of micropatterned cells and cellular networks. The well-known "microcontact-printing" andthe newly developed "electrochemical lithography" were applied to prepare the single-cell alignments. The cellular activity was found to be regulated by the cell shape. The patterned cardiomyocytes connected each other via gap junctions and served as a pharmacological model of cardiac tissue.

  78. 界面分子制御を基盤とする細胞チップ・デバイス技術

    西澤松彦

    未来材料 4 (11) 22-27 2004

    Publisher: エヌ・ティー・エス

    ISSN: 1346-0986

  79. Internet Discussion Viewing Future of ECSJ

    Electrochemistry 71 (7) 609-650 2003/07/05

    Publisher: 電気化学会

    ISSN: 1344-3542

  80. Be a Pioneer in the Field of Something Electrochemistry

    NISHIZAWA Matsuhiko

    69 (2) 129-129 2001/02/05

    ISSN: 1344-3542

  81. マイクロ電極を用いたバイオセンシングとイメージング

    末永智一, 西澤松彦

    未来材料 1 (6) 6-11 2001

    Publisher: エヌ・ティー・エス

    ISSN: 1346-0986

  82. AFMによる「付けペン」方式のナノリソグラフィー

    西澤松彦

    化学 55 51-52 2000

  83. Electrochemical Insertion Behavior of Lithium Ions into Mesophase Pitch Carbon Films Prepared by Electrostatic Spray Deposition

    LEE Seo-Jae, ITOH Takashi, NISHIZAWA Matsuhiko, YAMADA Kohta, UCHIDA Isamu

    Electrochemistry 66 (12) 1276-1280 1998/12/05

    Publisher: 電気化学会

    ISSN: 1344-3542

  84. Underpotential deposition of silver onto gold electrodes covered with self-assembled monolayer of alkanethiols.

    D Oyamatsu, M Nishizawa, S Kuwabata, H Yoneyama

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY 215 U424-U424 1998/04

    ISSN: 0065-7727

  85. Preparation of Mixed Metal Oxide Films by Electrostatic Spray Deposition

    YAMADA Kohta, SATO Nobuaki, FUJINO Takeo, NISHIZAWA Matsuhiko, UCHIDA Isamu

    Jitsumu Hyomen Gijutsu 49 (8) 911-912 1998

    Publisher: The Surface Finishing Society of Japan

    DOI: 10.4139/sfj.49.911  

    ISSN: 0915-1869 1884-3409

  86. リチウム二次電池におけるin situ XRD及び導電率測定

    西澤松彦, 内田勇

    電気化学 66 991-995 1998

  87. 微小アレイ電極を用いるコンダクトメトリック酵素素子の開発

    末永智一, 西澤松彦, 内田勇

    日本化学会誌 493-501 1995

    DOI: 10.1246/nikkashi.1995.493  

  88. マイクロセンサ「マイクロアレイ電極」

    西澤松彦, 末永智一, 内田勇

    表面技術 46 21-25 1995

  89. CONDUCTOMETRIC ENZYME SENSOR-BASED ON MICROARRAY ELECTRODE COATED WITH ULTRATHIN CONDUCTING POLYMERS

    M NISHIZAWA, T MATSUE, UCHIDA, I

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY 208 207-PMSE 1994/08

    ISSN: 0065-7727

  90. 極微電解重合反応とその応用

    西澤松彦, 末永智一, 内田勇

    化学工業 45 (2) 47-51 1994

    Publisher: 化学工業社

    ISSN: 0451-2014

  91. アレイ電極を用いる酵素センサ

    末永智一, 西澤松彦, 内田勇

    化学工業 44 (10) 29-32 1993

    Publisher: 化学工業社

    ISSN: 0451-2014

Show all ︎Show first 5

Books and Other Publications 26

  1. 次世代マイクロニードルの開発と応用

    西澤松彦

    シーエムシー 2022/12

  2. オンサイトエネルギー : エネルギーハーベスティングの要素技術と新展開

    西澤松彦

    シーエムシー出版 2022/04

    ISBN: 9784781316642

  3. 近未来のデジタルヘルスを支える酵素バイオ技術 : センサと発電

    西澤松彦

    シーエムシー出版 2022/02

    ISBN: 9784781316604

  4. 近未来のデジタルヘルスを支える酵素バイオ技術 : センサと発電

    西澤松彦

    シーエムシー出版 2022/02

    ISBN: 9784781316604

  5. ストレッチャブルエレクトロニクスの技術動向

    西澤松彦

    シーエムシー出版 2021/06

    ISBN: 9784781316079

  6. 酵素トランスデューサーと酵素技術展開

    吉田昭太郎, 西澤松彦, 三宅丈雄

    シーエムシー 2020/03

  7. Nanocarbons for Energy Conversion: Supramolecular Approaches

    NISHIZAWA Matsuhiko

    Springer 2018/07

  8. 臓器チップの技術と開発動向

    長峯邦明, 西澤松彦

    シーエムシー 2018/04

  9. Intelligent Nanosystems for Energy, Information and Biological Technologies

    NISHIZAWA Matsuhiko

    Springer 2016/05

  10. ウェアラブルデバイスの小型、薄型化と伸縮、柔軟性の向上技術

    西澤 松彦

    技術情報協会 2015/12

  11. スマートヒューマンセンシング

    西澤松彦, 三宅丈雄

    シーエムシー 2014

  12. 先端バイオマテリアル

    Kuniaki Nagamine, Matsuhiko Nishizawa

    NTS 2013

  13. Enzymatic Fuel Cells: From Fundamentals to Applications

    M. Nishizawa, T. Miyake

    John Wiley & Sons 2013

    ISBN: 9781118369234

  14. PEDOTの材料物性とデバイス応用

    西澤松彦

    サイエンス&テクノロジー 2012

  15. バイオ電池の最新動向

    吉野修平, 三宅丈雄, 西澤松彦

    2011

  16. Energy Harvesting

    T. Miyake, M. Nishizawa

    CMC 2010

  17. 第3版現代界面コロイド化学の基礎

    編集小山昇, 執筆西澤松彦, ほか多数

    丸善 2009

  18. 自己組織化とは何か(ブルーバックス)

    都甲潔, 江崎秀, 林健司, 上田哲男, 西澤松彦

    講談社 2009

  19. MEMS/NEMS工学全集

    監修 桑野博喜, 執筆 西澤松彦, ほ

    テクノシステムズ 2009

  20. 自己組織化ハンドブック

    西澤松彦

    シーエムシー 2009

  21. 細胞分離・操作技術の最前線

    梶弘和, 西澤松彦

    シーエムシー 2008

  22. 先進化学センサ

    西澤松彦

    ティー・アイ・シー 2008

  23. バイオ電気化学の実際

    安部隆, 西澤松彦

    シーエムシー 2007

  24. 動物実験代替のためのバイオマテリアル・デバイス

    梶弘和, 西澤松彦

    シーエムシー 2007

  25. 電池革新が拓く次世代電源

    西澤松彦

    エヌ・ティー・エス 2006

  26. Electrochemical Microsystem Technologies

    Matsuhiko Nishizawa, Isamu Uchida

    Taylor & Francis 2002

Show all Show first 5

Presentations 77

  1. ナノカーボン電極で創る酵素バイオデバイス Invited

    西澤 松彦

    NBCIテクロロジー委員会 ナノカーボンWG主催講演会 2018/09/13

  2. カーボンナノチューブを活用したバイオ発電フィルム Invited

    西澤 松彦

    第8回ナノカーボンバイオシンポジウム 2018/09/10

  3. Organic skin patch with built-in enzymatic fuel cell for drug dosing and wound healing International-presentation Invited

    NISHIZAWA Matsuhiko

    28th World Congress on Biosensors 2018/06/14

  4. 皮膚オンロニクス工学の開拓 Invited

    西澤 松彦

    第2回有機・バイオニクス研究会 2018/03/12

  5. Biocompatible Moist Microelectrode Systems International-presentation Invited

    NISHIZAWA Matsuhiko

    14th International Conference on Flow Dynamics 2017/11/02

  6. 酵素とCNT混合による酵素電極シール Invited

    西澤 松彦

    日本学術振興会 第131委員会研究会第283回研究会 2017/02/20

  7. ウェット電極で創る診断・治療パッチデバイス Invited

    西澤 松彦

    応用物理学会M&BE講習会 2016/11/07

  8. Enzyme / Carbon Nanotube Composite Electrodes for Self-Powered High Performance Biodevices International-presentation Invited

    NISHIZAWA Matsuhiko

    Asia NANO 2016/10/10

  9. 酵素修飾ナノカーボン電極によるバイオセンサ・バイオ電池の開 Invited

    西澤 松彦

    高分子討論会 2016/09/14

  10. Hydrogel-Based Cytocompatible Electrode Systems International-presentation Invited

    NISHIZAWA Matsuhiko

    SSDM 2016/08/27

  11. ソフトウェット電極で創る生体親和デバイス Invited

    西澤 松彦

    JST新技術説明会 2016/07/07

  12. 酵素によるバイオ発電技術の現状と可能性 Invited

    西澤 松彦

    第7回エネルギーハーベスティング技術シンポジウム 2016/04/21

  13. Spaciotemporal Control of Bio-Assembly by Electrochemical Lithography International-presentation

    PACIFICHEM 2015 2015/12/15

  14. ウェアラブルデバイスとゲル-フレキシブルゲル電極の開発

    高分子学会 ゲルワークショップ 2015/09/17

  15. 酵素修飾ナノカーボン電極によるバイオセンサ・バイオ電池の開発

    第5回ナノカーボン実用化推進研究会 2015/09/10

  16. ソフト・ウェット電極で創る診断・治療シートデバイス

    電子情報技術部会 2015/07/31

  17. ハイドロゲルシートで創る伸縮性バイオアッセイデバイス

    日本動物細胞工学会 2015/07/09

  18. Moist Electronic Devices with High Affinity to Living Systems International-presentation

    EMNT2014 2014/11/08

  19. 導電性高分子電極のプロセシングとバイオメディカル応用

    電気化学会 2014/09/27

  20. 生体・環境に優しい酵素発電デバイス

    エネルギーハーベスティングコンソシアム 2014/09/26

  21. 生体に馴染むソフト・ウェット電気デバイス

    産学連携セミナー「第88回寺子屋せんだい」 2014/09/12

  22. さりげない健康センシングに向けたウェットデバイス技術の開拓

    第53回日本生体医工学会 2014/06/24

  23. バイオ発電シート

    高分子学会燃料電池研究会 2014/06/13

  24. Hydrogel-Based Electronic Devices with High Affinity to Living Systems International-presentation

    NIMS Conference 2014 2014/06/03

  25. 酵素による発電技術と安全&フレキシブル電源への展開

    インプラント・ウェアラブル型機器のエネルギーデバイス技術最前線 2014/02/26

  26. バイオ発電デバイス

    最先端電池技術-2014 2014/01/23

  27. 生体親和ウェットエレクトロニクスに向けたバイオ発電・ゲル電極の開発

    プリンタブルデバイス実装研究会 2013/10/23

  28. 生体親和性パッチ型医療デバイス開発の提案 International-presentation

    第4回次世代医療システム産業化フォーラム2013 2013/09/11

  29. Hydrogel-Based Contractile Electrodes for Stimulation of Cells and Tissues International-presentation

    IEEE EMBC’13 2013/07/04

  30. シート状バイオ発電システム

    日本化学会93春季年会 2013/04/04

  31. ハイドロゲルへの電極形成と応用

    第27回エレクトロニクス実装学会 2013/03/15

  32. In-Vitro Contraction Assay for Skeletal Muscle Cells Using Soft, Moist Electrodes Made of Hydrogels International-presentation

    IUMRS-International Conference on Electronic Materials 2012/09/24

  33. Microfabricated Miniature Biofuel Cells with Nanoengineered Enzyme Electrodes International-presentation

    The 62nd Annual Meeting of the International Society of Electrochemistry 2011/09/12

  34. Nano/Micro Devices for Dynamic Control of Cellular Adhesion and Functions International-presentation

    International Conference on Nanoscience and Nanotechnology 2010/11/08

  35. Metabolic Bioassay Using Gel Sheet-Based Skeletal Muscle Cell Culture System International-presentation

    KIST-Tohoku Joint Symposium on Nanobiomedical Engineering 2010/08/30

  36. Electrochemistry-Based Dynamic Control of Cellular Adhesion International-presentation

    第3回GCOE学生ワークショップ 2009/12/22

  37. 電気化学バイオリソグラフィーの開発と応用

    第19回日本MRS学術シンポジウム 2009/12/07

  38. 微細加工技術を駆使した生物電池の開発

    第45回境界領域電気化学セミナー 2009/11/27

  39. 先進バイオリソグラフィーの細胞アッセイ応用

    電気化学会 2009/09/10

  40. バイオ機能を搭載した情報エネルギーデバイス

    REDEEMシンポジウム 2009/07/25

  41. Enzyme-Based Bionic Batteries and Fuel Cells International-presentation

    JAPAN NANO 2009 2009/02/18

  42. 電気化学バイオリソグラフィーのセンシング応用

    日本バイオマテリアル学会シンポジウム 2008/11/17

  43. マイクロ流体バイオ燃料電池

    日本化学会マイクロリアクター研究会 2008/11/14

  44. Electrochemistry-Based Biointerface Engineering International-presentation

    7th International Symposium on Nano-Biomedical Engineering 2008/10/16

  45. バイオインターフェースの時空間制御

    化学工学会第40回秋季大会 2008/09/25

  46. バイオ燃料電池の研究動向

    日本機械学会マイクロエネルギー研究会第2回会合 2008/07/03

  47. バイオリソグラフィーとMEMS

    MEMS人材育成システム講演会 2008/03/03

  48. バイオニック発電デバイス

    東北大学異分野交流セミナー 2008/01/28

  49. バイオインターフェースのダイナミック制御

    第29回プロセス設計技術講演会 2008/01/25

  50. Micro Bioenergetic Systems International-presentation

    The 1st μEMS Symposium 2007/12/18

  51. Biointerface Engineering International-presentation

    Taiwan-Japan Bilateral Symposium on Research and Education of Nanotechnology 2007/12/03

  52. Biointerface engineering for Advanced Biodevices International-presentation

    The 3rd Frunhofer-Gesellschaft Symposium in SENDAI 2007/11/09

  53. バイオ機能電極によるエネルギー変換

    固体化学の新しい指針を探る研究会 2007/06/19

  54. バイオリソグラフィー技術のセンサ応用

    電気化学第74回大会 2007/03/29

  55. 体の材料で発電する

    ナノメディスン公開講座 2007/02/22

  56. バイオ/デバイス界面の時空間制御

    西澤松彦

    表面技術協会第114回講演大会 2006/10/13

  57. 電気化学的なバイオリソグラフィーのバイオチップ応用

    西澤松彦, 梶弘和

    第24回高分子表面研究会 2006/06/21

  58. Electrochemical Control of Bionic Interfaces for Advanced Biodiagnosis International-presentation

    M. Nishizawa

    12th Symposium on Sensing Technology 2006/05/27

  59. グルコース燃料電池の開発と体液発電

    西澤松彦, 都甲 真, 梶 弘和

    第45回 日本生体医工学会大会 2006/05/15

  60. Vitamin K3-Mediated Electrooxidation of Glucose in Biofluids International-presentation

    M. Nishizawa, M. Togo, H. Kaji, T. Abe

    209th Meeting of The Electrochemical Society 2006/05/07

  61. Electrochemical Bio-Lithography for On-Demand Immobilization of Proteins and Cells inside Microfluidic Cannel International-presentation

    M. Nishizawa, H. Kaji, M. Hashimoto

    209th Meeting of The Electrochemical Society 2006/05/07

  62. 医療用マイクロ生物燃料電池へのとり組み

    西澤松彦, 都甲真

    日本化学会第86春季年会 2006/03/27

  63. Enzyme-Based Fuel Cells for Biomedical Microdevices International-presentation

    M. Nishizawa

    PowerMEMS2005 2005/11/28

  64. Electrochemical Approach to Pattern Proteins and Cells within Microchannels International-presentation

    Hirokazu Kaji, Masahiko Hashimoto, Kazuto Tsukidate, Tomokazu Matsue, Matsuhiko Nishizawa

    µTAS2005 2005/10/09

  65. Electrochemical Bio-lithography for Controlling Bionic Interfaces International-presentation

    M. Nishizawa

    The 56th Annual Meeting of International Society of Electrochemistry 2005/09/26

  66. 電気化学バイオリソグラフィー:タンパク質や細胞を操る界面技術

    西澤松彦

    高分子学会、バイオ・高分子研究会 2005/09/23

  67. 電気化学バイオリソグラフィーの開発とバイオチップ応用

    西澤松彦

    電気化学会秋季大会 2005/09/08

  68. Elcrochemical Bio-lithography for In-Situ Immobilization of Proteins and Cells within MicrochannelsI International-presentation

    M. Nishizawa

    Transducers05 2005/06/05

  69. タンパク質や細胞を操る先進バイオマイクロマシン技術

    西澤松彦

    国際バイオEXPO 専門技術セミナー 2005/05/18

  70. Miniaturized Enzyme-Based Glucose / O2 Fuel Cell Using Vitamin K3 As Electron Mediator International-presentation

    F. Sato, M. Togo, T. Abe, T. Ohashi, I. M. Kamrul, T. Matsue, J. Kosuge, N. Fukasaku, M. Nishizawa

    PowerMEMS 2004 2004/11/29

  71. Electrochemical Microsystems for Manipulation and Characterization of Living Cells International-presentation

    M. Nishizawa

    2004 ASME Annual Meeting 2004/11/16

  72. Electrochemical Bio-lithography for Controlling Bionic Interfaces International-presentation

    M. Nishizawa, H. Kaji, K. Takoh, T. Matsue

    206th Meeting of The Electrochemical Society 2004/10/03

  73. バイオマイクロマシニングによる界面機能制御

    西澤松彦

    日本化学会東北支部大会 2004/09/17

  74. 電気化学反応を利用した細胞のマイクロパターニングと機能計測

    西澤松彦

    第25回バイオマテリアル学会 2003/12/16

  75. Micro- and Nanostructured Mammalian Cells International-presentation

    M. Nishizawa, H. Kaji, K. Takoh, A. Takahashi, T. Matsue

    204th Meeting of Electrochemical Society 2003/10/12

  76. Diaphorase-Based Enzyme Electrodes for Fuel Cell Applications International-presentation

    M. Nishizawa, J. Sato, T. Ohashi, M. K. Islam, T. Yasukawa, T. Matsue

    204th Meeting of Electrochemical Society 2003/10/12

  77. パターン培養細胞デバイスと化学センシング

    西澤松彦

    日本分析化学会第52年会 2003/09/23

Show all Show first 5

Industrial Property Rights 26

  1. 培養装置

    西澤 松彦

    Property Type: Patent

  2. 電極体、電極体の製造方法

    西澤 松彦, 中川, 加藤

    Property Type: Patent

  3. 複合材料及びその製造方法

    西澤 松彦, 長峯 邦明, 冨永 悌二, 中川 敦寛, 徳江 彩子

    Property Type: Patent

  4. プローブ、表皮電位測定装置、表皮電位測定方法、美容方法

    西澤松彦, 長峯邦明, 阿部結奈, 山崎研志

    Property Type: Patent

  5. 生体の対象部位の水分量を評価する方法

    西澤松彦, 長峯邦明, 久保田淳

    Property Type: Patent

  6. 生体固定用複合材料

    西澤松彦, 長峯邦明, 冨永 悌二齋木, 佳克荒井, 陽一新倉, 仁井樋, 栄二 香取, 幸夫岩崎, 真樹 中川, 敦寛川口, 奉洋新妻, 邦泰徳江, 彩子遠藤, 俊毅 萩原, 嘉廣綿貫, 宗則 橋本 功

    Property Type: Patent

  7. 複合材料

    西澤松彦, 長峯邦明, 冨永 悌二齋木, 佳克岩崎, 真樹中川, 敦寛川口, 奉洋

    Property Type: Patent

  8. 被覆複合材料

    西澤松彦, 長峯邦明, 冨永 悌二中澤, 徹岩崎, 真樹中川, 敦寛川口, 奉洋 徳江, 彩子新倉, 仁齋木 佳克

    Property Type: Patent

  9. 複合材料、複合材料の製造方法

    西澤松彦, 長峯邦明

    Property Type: Patent

  10. マイクロニードル及びマイクロアレイ並びにその製造方法

    西澤松彦, 甲斐洋行

    Property Type: Patent

  11. カテコール含有接着性ハイドロゲル、接着性ハイドロゲル作成用組成物、及び該接着性ハイドロゲルを応用した組成物

    藪浩, 西澤松彦, 長峯邦明

    Property Type: Patent

  12. 酵素電極の製造方法及び酵素電極

    西澤松彦, 小川雄大

    Property Type: Patent

  13. 創傷治癒用パッチ

    西澤 松彦

    Property Type: Patent

  14. 生体組織貼付用パッチ

    西澤松彦, 三宅丈雄, 新本 由紀子, 紺野 義一, 阿部 茜

    Property Type: Patent

  15. 細胞担持パターン化ナノ薄膜

    梶 弘和, 藤枝俊宣, 森 好弘, 西澤松彦, 阿部俊明, 永井展裕

    Property Type: Patent

  16. 分子導入方法

    西澤松彦, 長峰邦明, 森泉俊幸, 岡藤辰也

    Property Type: Patent

  17. 多孔質基板電極体及びその製造方法

    西澤 松彦

    Property Type: Patent

  18. タンパク質を包含したカーボンナノチューブフィルム、それを電極とするセンサ及び発電デバイス

    西澤松彦, 三宅丈雄, 吉野修平, 畠賢治, 山田健郎

    Property Type: Patent

  19. 導電性高分子からなるパターンを備えた多孔質構造体及びその製造方法

    西澤松彦, 関根宗一郎, 井門裕一郎

    特許第5712438号

    Property Type: Patent

  20. 細胞検査用バイオアッセイ用キット

    西澤松彦, 神崎展, 長峯邦明

    特許第5544474号

    Property Type: Patent

  21. 持続性ドラッグデリバリーシステム

    阿部俊明, 永井展裕, 梶弘和, 川島丈明, 西澤松彦, 西田幸二

    Property Type: Patent

  22. 角膜経上皮電気抵抗値の測定方法

    上松聖典, 北岡隆, 西田幸二, 田中佑治, 西澤松彦, 梶弘和, 関根宗一郎, 高島一

    Property Type: Patent

  23. バイオ電池

    西澤松彦, 都甲真

    5279069

    Property Type: Patent

  24. タンパク質および細胞が内壁に固定された中空構造体

    梶弘和, 西澤松彦

    4982752

    Property Type: Patent

  25. タンパク質の固定方法とタンパク質チップならびに細胞の固定方法および細胞チップ

    西澤松彦, 梶弘和, 末永智一

    4604216

    Property Type: Patent

  26. 細胞または組織の培養制御装置とその方法

    西澤松彦, 梶弘和, 末永智一

    4204913

    Property Type: Patent

Show all Show first 5

Research Projects 35

  1. Skin Iontronic Biomedical Engineering

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (S)

    Institution: Tohoku University

    2022/04/27 - 2027/03/31

  2. Study of skin-compatible iontronic technology

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2022/04/01 - 2026/03/31

  3. Hydrogel-based Chemical Stimulation Device

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Research (Exploratory)

    Institution: Tohoku University

    2023/06/30 - 2025/03/31

  4. Skin Iontronic Biomedical Engineering

    Nishizawa Matsuhiko

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Research (Exploratory)

    Institution: Tohoku University

    2020/07/30 - 2022/03/31

    More details Close

    Transepidermal potential (TEP), an electrical potential difference of tens of millivolts that is generated along the thickness direction of the epidermis, is a possible indicator of epidermal function, including the permeability barrier of skin. Herein, a patch-type wearable device for minimally invasive monitoring of TEP was developed by utilizing a porous microneedle (PMN) array made of an epoxy resin. In order to measure the potential of the subepidermal tissue, the entire surface of the PMN except for the needle tip was coated by a thin film of insulating parylene C. The open-tip PMN was integrated with a wearable potentiometric device composed of a pair of screen-printed Ag/AgCl electrodes. By optimizing the porosity and the size of the liquid junction, the TEP of tens of mV at a subject’s forearm was successfully monitored over a 4 h period.

  5. ソフトウェット電極で創る生体親和性デバイス

    西澤 松彦, 田中 徹

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(A)

    Institution: 東北大学

    2018/04/01 - 2022/03/31

    More details Close

    ソフトウェット電極(ハイドロゲル電極および酵素電極ファブリック)の機能拡張を推し進め,両者を組み合わせて,電気的な計測・刺激(診断・治療)を低侵襲に行う新規医療デバイスのプラットフォームを創出のを目的として研究を推進した。特に、ハイドロゲルなど有機材料の「生体組織と同様な柔軟性」や「分子透過性」,膨潤によるサイズ・形状の変化を活かした「体内患部への密着固定」などの基盤的な特徴を確立し,さらに,バイオ発電による「手術創治癒の促進機能」と「投薬制御機能」を搭載して,「エネルギー自立型」デバイスの実現可能性を示すことの具体を示すために実験を行うことができた。 今年度は、頭蓋内電極に関して、従来のカーボン繊維製の電極配線に代えて伝導性ゲルを配線することによって、脳表患部の可視性に優れた全透明のハイドロゲル電極の作製を行い、動物実験による機能実証までを行うことができた。伝導性ゲルを充填したシリコーン製マイクロチャネルを、表面微細構造によるインターロッキング接合によってゲル内に安定包埋してイオン性配線として活用した。一方、電荷固定したポーラスマイクロニードルを用いた経皮電気浸透流の発生メカニズムの実証に成功し、薬剤の高効率投与や、生体液の高効率採取に応用可能であることを示した。これを、昨年度開発した直列型高電圧バイオ電池と組み合わせることによって、オール有機のバイオ発電ポンプパッチの実現に到達できた。

  6. Medical engineering of skin ionics

    Nishizawa Matsuhiko

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Research (Exploratory)

    Institution: Tohoku University

    2018/06/29 - 2020/03/31

    More details Close

    In this research, we challenged to develop an in-situ technique for measuring "epidermal potential" during stimulus response. The developed epidermal potential measurement system realizes minimally invasive electrode placement under the skin by the "micro salt bridge" that uses a Terumo painless needle as a guide, and is a probe-type device that can measure the epidermal potential of the local skin. By using the probe device, the correlation between the skin stimulus response and the changes in the epidermal potential was studied. Furthermore, by mounting an optical fiber on this probe, it became possible to measure and analyze the optical response of the epidermal potential in the local skin.

  7. Creating eyeball bio-batteries and challenging to suppress local active oxygen

    Abe Toshiaki, Nishizawa Matsuhiko

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2015/04/01 - 2017/03/31

    More details Close

    We investigated the feasibility of the production of bio-batteries using micro-channel or eye ball by measuring active oxygen. It was possible to fabricate a porous polydimethylsiloxane (PDMS) film having an array of 10 micron pores and a PDMS mold having a flow path structure and culture retinal pigment epithelial cells (ARPE) in FY2015. In FY 2016, we could co-cultivate ARPE with HUVEC and found HUVEC migrate to the ARPE side, especially in some stress conditions. It turned out the possibility that mitochondria was involved in cultured cell death. Since the change in the generation of active oxygen was seen in mitochondria, we think there is a possibility to create the bio-battery, our final objective of production.

  8. Accelerated wound healing on skin by electrical stimulation with a bioelectric plaster

    NISHIZAWA Matsuhiko, YAMASAKI Kenshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2015/04/01 - 2017/03/31

    More details Close

    Wound healing on skin is accelerated by ionic current driven by a plaster device with a built-in enzymatic biofuel cell. Cells in the skin respond to electric current during a wound healing process. Taking advantage of this phenomenon, a stretchable bioelectric plaster is developed to generate ionic current along the surface of the skin by enzymatic electrochemical reactions. The bioelectric plaster fits to the skin and generates electric current above the wound for 12 hours. The comparison between conditions with and without the bioelectric plaster suggested that ionic current in the hydrogel promotes the wound healing process. To the best of our knowledge, the present work is the first application of the enzymatically generated ionic current to direct manipulation of biological functions of a living body. The further improvement of bioelectric plasters will expand the use of electrical stimulation in wound healing for in vivo studies as well as clinical applications.

  9. Hydrogel-Based Conducting Polymer Electrode for Efficient Stimulation of Cells

    Nishizawa Matsuhiko, KANZAKI Makoto, YAMAZAKI Kenshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2013/04/01 - 2017/03/31

    More details Close

    We have succeeded in developing a technique to laminate the composite of conducting polymer PEDOT and polyurethan (PEDOT-PU) onto hydrogel substrates by the novel interfacial photo-initiated radical polymerization of the polymer of adhesion layer. This technique enable the lamination of even the insulated PEDOT-PU electrodes, improving the accuracy and sensitivity on the medical use. In addition the possible function of self-immobilization to organs was demonstrated by using the PEDOT-PU-laminated hydrogel devices. As an example, the the expansion force of the gel substrate showed self-fixing to the gaps of brain. The curling force of the gel sheet showed self-wrapping to a neuronal bundle.

  10. Bio-MEMS with reversible antibody on sensor chip

    Umetsu Mitsuo, MATSUI JUN, NAGAMINE KUNIAKI, NISHIZAWA MASAHIKO

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2013/04/01 - 2016/03/31

    More details Close

    Microelectromechanical system for biology has the potential for reconstituting chain chemical reaction and protein-protein interaction in cell. However, for the construction of cell in MEMS, The ways to immobilize a protein on a specific position on MEMS and to irrepressibly immobilize proteins on MEMS should be studies. In this study, we evaluated material-binding peptide to the peptide with reversible binding to material surfaces. The peptide could be reversibly bound by the change of ionic strength in solution.

  11. Hydrogel-based Device Driven by Enzymatic Battery

    NISHIZAWA Matsuhiko

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2013/04/01 - 2015/03/31

    More details Close

    A totally flexible, sheet-shaped biofuel cell has been developed by stacking a bioanode fabric, a hydrogel sheet containing electrolyte and fuel (fructose), and an O2-diffusion biocathode fabric. The results presented include two strategies to improve the performance of the device. (1) An anode modified with an appropriate CNT dispersion showed higher activity. (2) The gas-diffusion biocathode was improved by optimizing its hydrophobicity. The improved biofuel cell sheet produced a maximum power density of 1.0 mW/cm2 at 0.36 V even when bent. Such a flexible, sheet-shaped power source could be combined in the future with flexible electronic to make wearable devices.

  12. 微小空間内溶液のマルチイオン環境動的制御システム

    梶 弘和, 西澤 松彦

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究

    Institution: 東北大学

    2009 - 2010

    More details Close

    導電性高分子を利用する有機イオンポンプの作製プロセスを改良した。電極アレイ基板とアガロースゲルのマイクロスタンプから成る電気化学リソグラフィー用のデバイスを作製した。アガロースゲルには臭化物イオンの溶液が染み込ませてあり、電極で生成される次亜臭素酸は、ゲル内を拡散し、スタンプ表面に輸送される。このデバイスを用いることで、スタンプと基板上のポリスチレンスルホン酸をドープしたpoly(3,4-ethylenedioxythiophene)(PEDOT : PSS)薄膜パターンとの位置合わせが容易になり、PEDOT : PSS薄膜への過酸化領域の形成精度が向上した。 イオンポンプ機構を付与したPEDOT : PSS薄膜パターンに微小溶液チャンバーを設置し、ナトリウムイオンおよびカルシウムイオンの輸送を検討した。ソースチャンバーにナトリウムイオンの溶液、ターゲットチャンバーに当該イオンの蛍光プローブを満たし、過酸化領域を挟んだPEDOT : PSS薄膜間にポンプ駆動電圧を印加すると、過酸化領域のアウトレット付近から蛍光強度が上昇していく様子が観察され、ナトリウムイオンのターゲットチャンバーへの輸送が確認された。カルシウムイオンを用いた検討においても、同様の結果が得られた。これらの検討結果を踏まえ、二つのソースチャンバーとターゲットチャンバーをそれぞれ過酸化領域で接続したマルチイオン輸送デバイスを作製した。各イオンポンプは独立して駆動可能であり、ターゲットチャンバー内にタンパク質や細胞を配置することで、ダイナミックに変化するイオン環境との相互作用評価が可能になると期待できる。

  13. Microelectrode Techniques for Cellular Engineering

    NISHIZAWA Matsuhiko, KAJI Hirokazu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2008 - 2010

    More details Close

    We have succeeded in developing a technique to culture myotubes on a fibrin gel sheet. The prepared myotube culture on the hydrogel stably contract on electrical stimulation for more than 1 week. We also succeeded in preparing PEDOT microelectrodes on hydrogels like collagen and agarose, that shows surface resistivity of 50 Ω/□. The combination of these two hydrogel sheets, on which myotubes and PEDOT are micropatterned, provides a totally contractile biochip that will be a powerful tool for the muscle-targeted drug development.

  14. Research of a nano-energy system creation

    KUWANO Hiroki, NISHIZAWA Matsuhiko, ONO Takahito, ORIMO Shinichi, TANAKA Shuji, NAGASAWA Sumito, ANBE Takashi, OKAMOTO Hiroshi, ONUKI Teppei, CAO Ziping, HAMATE Yuichiro, OGUCHI Hiroyuki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Creative Scientific Research

    Institution: Tohoku University

    2006 - 2010

    More details Close

    Micro power generator required in the field of telecommunication, medicine/welfare and so on has been developed. We established fundamental technologies for the micro generator such as materials, highly efficient optimum design. We have succeeded high-power micro fuel cells by applying micro combinatorial and vacuum insulation technology, long life high-power bio-fuel cells by applying carbon nano-tube enzyme electrode and auto-stack structure technology, and highly efficient vibration-based micro energy harvester by applying self-standing electret film and broadband vibration structure technology. In addition, solid electrolyte materials for low temperature operation and micro detonation technology were established as innovative basic technologies.

  15. 導電性高分子の超異方性電析による細胞インターフェースの構築

    西澤 松彦

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 萌芽研究

    Institution: 東北大学

    2006 - 2007

    More details Close

    本研究課題の目的は,導電性高分子による機能的配線をマイクロパターニングする技術の開発である.これを,申請者が別途開発した細胞パターニング技術と組み合わせることで,細胞ネットワークへの情報の入出力機構を搭載した新しいバイオアッセイ,さらには細胞デバイスの実現を目指した.導電性高分子による配線の形成には,申請者が以前に開発した「超異方性電析法」を基盤とし,これを改良して取り組んだ.その結果,ガラス表面に静電的に吸着させたヘパリンによって,ポリピロールの側方成長が顕著に促進される事がわかった。そして,電気化学バイオリソグラフィー法によってヘパリンを除去することによって,電極から成長するポリピロールパターンの形状をその場で描画できる事が明らかとなった。一方,細胞が存在する状況で重合が行なえるか否かに関しても検討を進めた。ピロールモノマーの細胞傷害性は実質上問題となら無い程度に低い事がわかり,重合反応の影響に関しても,緩衝液の濃度を高める事によって低減できた。以上の知見を組み合わせて,培養細胞への導電性高分子による「その場配線」の実施に成功した。さらに,導電性高分子薄膜の表面に生化学的な機能を付与するための技術も合わせて開発した。ポリアクリル酸をドーパントに用いる事で表面にカルボキシル基を提示し,アミド結合によって各種サイトカインの固定を試みた。神経成長因子を固定した高分子膜上では,PC12神経様細胞の軸策伸長が顕著に増進され,本法の有効性が示された。

  16. マイクロ電気化学システムによる細胞接着の3次元操作

    西澤 松彦, 安部 隆, 梶 弘和

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究

    Institution: 東北大学

    2006 - 2007

    More details Close

    本研究は,電気化学反応によって細胞接着を操作する技術「電気化学バイオリソグラフィー」を3次元構造体への細胞接着の操作へ拡張し,細胞培養担体(スキャホールド)内部への異種細胞から成る反復構造の作製へのチャレンジである。先ず,ガラスとPDMSからなるマイクロ流路デバイスの内部に細胞の共培養系を作製する事に成功した。あらかじめ流路の内壁にマイクロ電極のアレイを作製しておき,流路内部をヘパリン被覆した後にKBr水溶液を充填して電極に1.5Vを印加すると,電極の対面部位のヘパリンが脱着して細胞接着性へと変化し,細胞培養が出来た。隣接するマイクロ電極で同様の操作を違う種類の細胞に対して行なうと,流路内に異種細胞を配列させ,共培養化する事ができた。次に,あらかじめ電極を配置しておく必要が無いシステムの開発を意図して,針電極による細胞接着誘導を検討した。シリコンゴムチューブの内壁をヘパリン修飾し,そこへ針電極を刺して上述の反応を行う事によって,電極を刺した領域のみに細胞接着を誘導できた。さらに共培養化も出来た。この結果は,3次元構造体の内部に共培養系を造り込むという当初の目的を達成した典型的な一例であるとともに,血管内皮細胞の培養によって,血管を模擬したせん断応力と引っ張り応力が負荷できるモデルとなる可能性を有している。これは血流と細胞動態との関連を探るトレース実験を可能とする,これまでに無かった実験系を提供する可能性を有している。

  17. Development of Electrochemical Biolithograpy and application to Cellular Chips

    NISHIZAWA Matsuhiko, ABE Takashi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2005 - 2007

    More details Close

    Microfluidic systems have been widely investigated for biological applications and hold great promise in the development of diagnostic assays and bioreactors. The combination of the surface patterning techniques with the microfluidic systems paves the way to multi-functional, high-throughput, and cost-effective analysis, in which the "real-time" and "on-demand" micropatterning of bioelements within the microchannels would be essentially required since such delicate materials are unstable to desiccation, oxidation, and heat. However, most of the photolithography-based techniques are unable to be applied within the sealed microchannels. In this research, we have developed a novel technique "electrochemical bio-lithography", which enables the localized immobilization of proteins and cells within 3D microstructures such as microfluidic channels. The principle of the technique is based on our finding that the albumin- or heparin-coated surfaces, initially anti biofouling, rapidly becomes protein- and cell-adhesive upon exposure to the reactive oxidizing agent such as hypobromous acid, which can be produced by the electrochemical oxidation of bromide ion in a biological buffer solution. Since this lithography can be conducted under typical physiological conditions, it enables the spatiotemporal control of cell adhesion and growth on substrates; it facilities the stepwise immobilization of multitype protein arrays and multiphenotype cell arrays. And importantly, this technique is simple enough to be integrated into the miniaturized and semi-closed systems such as microfluidic devices, indicating the possible "on-demand" immobilization of proteins and living cells just prior to use of the microfluidic biodevices. In addition, we have achieved rapid cellular arrangement in the semi-closed microfluidic channel by combining electrochemical bio-lithography with negative dielectrophoresis (DEP).

  18. マイクロ電極を用いる細胞接着の誘導と細胞チップの構築

    西澤 松彦

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 萌芽研究

    Institution: 東北大学

    2004 - 2005

    More details Close

    細胞培養環境下で細胞の接着箇所を書き込むバイオリソグラフィー,「電気化学バイオリソグラフィー」を開発した。異なる細胞種を順次配列してネットワーク化することが原理的には可能であるということを,明らかにした。この技術を用いて,細胞遊走の電気化学的なナビゲーションに初めて成功した。すなわち,電気化学バイオリソグラフィーにより,予め細胞のマイクロパターンを作成しておき,その細胞周辺に2回目のリソグラフィーを行うと,その改質パターンに沿って細胞が増殖し遊走することを実証できた。この方法をさらに改良して,細胞の遊走性を指標とする遊走アッセイの新しい方法への展開を試みた。しかし,このような実験は,比較的長時間の培養と観察を必要とし,ヘパリンによるブロッキングの耐久性が不十分であった。そこで,予めMPCポリマーなどで一次パターンを作成しておき,そこにヘパリンによるブロッキングと電気化学リソグラフィーを適用する方法に切り替えた。 MPCポリマーのパターニングは,シリコーンで作製したマイクロ流路を用いて,行った。このMPCポリマーのパターニングは,他種の細胞工学研究にも有効な技術である。MPCポリマーのパターンは比較的長期の耐久性を有し,次亜臭素酸による電気化学リソグラフィーで改質されないことが分かった。これらの改良によって,パターンサイズに依存した細胞遊走速度を評価することができた。細胞骨格にダメージを与える薬剤によって,遊走活性が大幅に低減することも確かめた。

  19. 細胞のネットワーク培養によるバイオデバイスの構築

    西澤 松彦

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 若手研究(A)

    Institution: 東北大学

    2003 - 2004

    More details Close

    この研究は,マイクロスタンプ法による細胞のパターン培養と,電気化学的な細胞計測を組み合わせる融合研究としてスタートした。マイクロスタンプ法の改良によって,ガラス基板上に心筋細胞やPC12細胞などの興奮性細胞を単一セルレベルで配列することが出来た。得られた細胞パターンに沿った情報伝達を,共焦点蛍光顕微鏡による細胞内Ca2+イオン濃度の計測によって追跡し,単一細胞レベルネットワークにおけるギャップ結合やシナプス結合の形成と機能を確認できた。細胞パターン形状と細胞活性の対応付けにも,マイクロ電極を用いる独自の計測で成功している。また,細胞パターンをマイクロ流路チップ内に作成して,細胞パターンの局所に薬剤投与が可能であること,それによって細胞間の機能的連結の薬剤応答を精密に評価できることを示した。これらの成果により,本研究の当初の目的は達成できたといえる。さらに,研究の過程で,電気化学反応を利用して細胞の接着箇所を書き込む技術「電気化学バイオリソグラフィー」を新規に開発することが出来た。これは,細胞培養環境下で行うバイオリソグラフィーであり,異なる細胞種を順次配列してネットワーク化することが原理的には可能と期待できる。マイクロスタンプ法を含む既存の方法で作成できる細胞パターンは1種類の細胞に限られていた。電気化学バイオリソグラフィーの適用で,異種細胞間(神経細胞と筋細胞など)の機能的結合に対する薬剤応答を評価する研究ツールが作成できると期待している。

  20. 走査型電気化学/化学発光顕微鏡を用いた酵素触媒界面の電気化学/発光イメージング

    末永 智一, 西澤 松彦, 珠玖 仁

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究

    Institution: 東北大学

    2003 - 2004

    More details Close

    本研究では、自作の走査型電気化学顕微鏡(SECM)に発光・蛍光・トポグラフィー計測系をハイブリッドしたシステムにより、ナノメートルレベルの生体機能表面を評価し、デバイス作製や環境センシングへ展開する.これまでの研究で、探針-試料間距離および探針サイズをナノメートルオーダーで制御することを可能にした.これによりイメージングにおける空間分解能の向上のみならず、局所反応誘起に基づくナノリソグラフィーが期待できる. 1.我々の計測システムでは、シアーフォース(せん断応力)フィードバック距離制御を採用することにより、プローブ-基板間距離を100nm以下に保持することが可能となっている.基板と垂直方向にプローブを振動させる距離制御プログラムに改良し、イメージングの際生体試料に与える付加を大幅に軽減することができた.具体的には、プローブをxy方向の振動に加えz方向にも作動して距離制御を行うことで、試料に衝突させずに高解像度イメージングが可能となった(防衛大学山田弘博士との共同研究). 2.細胞を液中で安定にイメージングすることができた.細胞骨格を蛍光染色した試料の形状・蛍光同時イメージングを検討した.さらに、生細胞をそのままイメージングすることも可能であることを確認した. 3.ガラスキャピラリを細尖化したのち、金スパッタ蒸着膜/パリレン蒸着膜の順でコートした.パリレン絶縁膜は安定性に優れ、電極半径70nmのナノ電極を作製できた.電極型(〜100nm)、光ファイバ型(孔径〜100nm)、および光ファイバ-電極複合型ナノプローブ各種を作製した. 4.デバイス作製技術:プロテインアレイのディメンジョンをナノメートルオーダーにスケールダウンするための要素技術として、ナノ微細加工技術、微粒子配列化技術、極微量サンプルの操作技術が挙げられる.誘電泳動を利用して、微粒子のマニピュレーション、タンパク質-細胞のパターニング技術を確立した.

  21. 走査型電気化学/化学発光顕微鏡を用いた発光性酵素触媒界面のイメージング

    西澤 松彦, 小谷松 大祐

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究

    Institution: 東北大学

    2002 - 2002

    More details Close

    西洋ワサビペルオキシダーゼ(HRP)をスポット固定した基板の酵素活性を,電気化学顕微鏡でイメージングした.また,局所領域に化学活性種を導入する手段として,電気泳動を利用して活性種を供給するキャピラリーインジェクションシステムを構築し,化学発光イメージングによってその特性を評価した.ガラスキヤピラリーの先端にアクリルアミドゲルを充填し,内部にルミノール溶液を満たす.キャピラリー内部の電極と外部の電極の間に直流電流を流すことによって電気泳動を起こさせ,マイナスの電荷を持ったルミノールを試料表面に押し出した.押し出されたルミノールは基板に固定されたHRPを触媒としてH_2O_2と反応し化学発光を生じる.これをフォトンカウンタによって検出した.発光強度は印加した電流値に比例し,pmol/secの極微量インジェクションが制御可能であることが示された。ルミノールが運ぶ電気量の割合が一定である実験結果より,キャピラリーの種類によらずに電流値のみで放出量が決まると分かった.このインジェクションシステムを用いて,HRP単分子膜の活性イメージングにも成功した.さらに,冷却式のフォトンカウンタによる測定バックグラウンドの低減にも取り組んだ.一方,ルミノール注入用のキャピラリープローブを,シアーフォース検出によるフィードバック制御を用いて基板のごく近傍まで接近させる制御系の構築にも手ごたえを得ており,これらを総合してシステム化することで,ELISA法への適用が期待できる.

  22. 細胞の局所固定による隔膜型バイオ素子の構築

    西澤 松彦

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 若手研究(B)

    Institution: 東北大学

    2001 - 2002

    More details Close

    本研究の目的は,付着性の各種動物細胞を基板細孔部へ誘導・固定して細胞固定化基板を作製し,単一細胞レベルでの電気的特性評価および外部刺激に対する応答特性評価を行うこと,および細胞機能を利用した新規な隔膜型バイオ素子を開発することである。 初年度(13年度)において,「異方性エッチングによる細孔基板の作製」に成功しており,これは,孔経10μm以下の細孔を有するシリコン基板である. 本年度は,さらに作製した微細孔へ,ウシ大動脈内皮細胞やPC12神経様細胞を培養することから研究を開始した.内皮細胞は微細孔部へ内皮様組織を形成し,神経細胞は基板表面から裏面に軸策を成長させ,細孔間を短絡する性質を示した。 研究過程で,細胞接着の誘導が基盤技術として重要であるとの認識が強まり,微細孔部にのみ細胞接着を誘導するためのパターン培養技術の開発に集中した.ポリジメチルシロキサンによるマイクロスタンプを作成し,これを用いて細胞接着タンパク質を疎水化ガラス基板上にパターン転写した。子宮頚癌細胞(HeLa),ウシ大動脈内皮細胞,ニワトリ胚由来心筋細胞,PC12神経様細胞などを培養したところ,これらすべての細胞株が〜5μmの精度でパターン化された。配列したニワトリ心筋細胞はパターン全体が電気的に共役した挙動を示し,ミニチュア心筋組織が形成された.これを用いて,オクタノールによる拍動停止や,カフェインによる拍動活性化など,心筋組織で知られる代表的な薬理効果を確認することができた.

  23. Imaging of Cell-Array by Scanning Electrochemical Microscopy

    MATSUE Tomokazu, OYAMATSU Daisuke, NISHIZAWA Matsuhiko

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2001 - 2002

    More details Close

    In the present project, we investigated two topics: 1) the micropatterning of living cells, 2) activity measurements of single cells. These research topics can be combined as the "bioassay using micropatterned living cells", which would lead to the development of cell-chip technology. The results obtained in this project can be summarized as follows, 1) Preparation of cellular micropatterns: We succeeded to prepare micropatterns of adhesive animal cells on a glass slides by the micro-contact printing method using PDMS-made microstumps. The cellular adhesive protein such as fibronectin was used as the ink material. HeLa cells, chick cardiomyocytes and PC12 nuronal cells were successfully patterned to form cellular networks on a single cell level. The application of PEG molecules as the cell resistive modification works well so as to maintain the cell pattern for more than 5 days. 2) Activity evaluation of the micropatterned cells: The respiratory activity of the micropatterned HeLa cells was imaged by using the scanning electrochemical microscopy (SECM) system. It was found that the respiration activity of the shape-restricted cells is higher than that of the freely spreading cells. 3) Evaluation of the activity of the patterned cellular networks: The intracellular Ca2+ imaging was conducted for the micropatterned cardiac myocytes. The micropatterned cardiac myocytes were found to form the electrically conjugated network via forming the gap junctions. It was achieved to observed the pharmacological effects of octanol, tetrodotoxyn, and caffein for the cardiac tissue model on the chip. The local dosing to the patterned cells has also been attempted by applying the microfuluidic device systems.

  24. micro bio fuel cell Competitive

    2001/04 -

  25. Novel Devices Based on Living Cell and Tissue Competitive

    2001/04 -

  26. in situマイクロコンダクトメトリー法の開発と電池活物質粒子への展開

    西澤 松彦

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 奨励研究(A)

    Institution: 東北大学

    1999 - 2000

    More details Close

    各種マイクロ電極を用いた電気伝導度のその場測定(in situマイクロコンダクトメトリー)を開発し、リチウムイオン電池の活物質粒子1個およびそのコンポジット薄膜に適用することに成功した。電池材料の導電率は電池性能に直接影響する重要なパラメーターであり、本研究により、充放電深度(電位)と対応づけた導電率の精密な評価が初めて可能となった。 (1)単一粒子のin situマイクロコンダクトメトリー 低温焼成メソカーボンマイクロビーズ(MCMB)粒子1個をガラスセパレーターの細孔に固定し、顕微鏡観察下で針状マイクロ電極2本を標的粒子に接触させ,バイポテンショスタットを用いて充・放電反応(リチウムイオンの脱・挿入)中の直流導電度変化を計測した。これまでX線回折と充放電試験によって予測されてきた層状微結晶間隙へのリチウム挿入反応を,導電率測定という新しい視点から確認し,議論することに成功した。 (2)コンポジット薄膜のin situマイクロコンダクトメトリー フォトリソグラフィーでSiO_2/Si基板上に白金の交互型マイクロアレイ電極を作製した。その形状は10μm幅のバンド電極20本が50μm間隔で対向配置したものである。このアレイ電極上にドクターブレード法で活物質粒子のコンポジット薄膜(膜厚約20μm)を作成した。バインダー高分子にはPVDFを用い、アセチレンブラックやコロイド状カーボンなどの導電助剤を種々のコンポジット比で添加した。調製した薄膜サンプルについて、バイポテンショスタットを用いて充・放電反応を繰り返し行い、電位-導電度プロファイルの変化を追跡した。(1)で得た活物質自体の挙動を考慮し、コンポジット薄膜内の導電ネットワーク保持のための薄膜調製条件の最適化を行った。

  27. Imaging and Manipulation of Single Living Cells with SECM

    MATSUE Tomokazu, NISHIZAWA Matsuhiko

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B).

    Institution: Tohoku University

    1999 - 2000

    More details Close

    1. Scanning electrochemical microscopy (SECM) was used for imaging of photosynthetic and respiratory activity of a single plant cell by mapping two-dimensionally the localized oxygen concentration around the cell. 2. SECM was used for investigation of the effect of chemicals on a single protoplast. When DCMU, a photosynthetic electron-transfer inhibitor, was injected into the protoplast, the SECM image of the protoplast becomes gloomy and deformed due to a decrease in the generation of oxygen from the protoplast Similarly, respiratory activity of animal cells can also be imaged with SECM. 3. A dual-Pt microdisk electrode was used as a probe for SECM to simultaneously detect two electroactive species near a single protoplast. The topographic image of the single protoplast was obtained from the variation of oxidation current for Fe (CN) 64-at one disk. The detection of localized oxygen concentration at another disk was used for imaging photosynthetic activity of the cell. 4. Oxygen consumption of individual bovine embryos was noninvasively quantified by SECM.When an embryo reached the stage of a morula with a 74-μm radius on day 6 after in vitro fertilization, the oxygen consumption rate of the single morula was estimated to be 1.40±0.27×10-14 mol s-1. After the SECM measurement, the embryo was continuously cultured for another two days. The oxygen consumption rate of the blastocyst was found to be in the range of 2.50±0.46×10-14 mol s-1<F<4.49±0.50×10-14 mol s-1. 5. A microbial chip for bioassay was fabricated and its performance was characterized by SECM.The respiration activity of the E.coli spot at the chip was imaged with SECM by mapping the oxygen concentration around the spot. The bactericide effects of antibiotics were measured using the E.coli-based microbial chip. 6. Dielectrophoretic manipulation of a single chlorella was conducted using a dual-microdisk electrode. An attractive or repulsive force was induced to chlorella depending on the frequency of ac voltage applied between the two disk electrodes. The effect of both the frequency and ion concentration of solutions on the dielectrophoretic force on a chlorella was investigated in detail based on the theories of dielectrophoresis.

  28. マイクロ電極システムの構築と電気化学的プロチウム個溶過程解析への展開

    西澤 松彦, 内田 勇

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究(A)

    Institution: 東北大学

    1999 - 1999

    More details Close

    プロチウム固溶機能を有する各種合金材料への電気化学的なプロチウム挿・脱入反応を、マイクロ電極を用いたその場(in-situ)測定によって精密に評価し、水素2次電池用新規材料の探索と高性能化を目指した。研究の特色はマイクロ電極を用いる新規な電気化学システムにあり、合金粒子1個を測定対象とすることを可能とした。これにより、高分子結着剤や導電助剤が混在しない、合金粒子自体の電気化学挙動を精密に評価することが出来る。 本年度は単一粒子測定に代表されるマイクロ電極システムのさらなる発展が随所で実現した。例えば、単一粒子の交流インピーダンススペクトル(周波数分散)の測定に成功した。これにより、これまで行なってきた律速過程(プロチウムの合金内拡散)の解析に留まらず、電荷移動パラメータ(交換電流値や対象因子など)の議論も可能となった。また、単一粒子測定系にペルチェ素子による温度制御ユニットを追加し、電池運転時の発熱を考慮した高温(例えば50度)での特性評価を可能とした。一方で、交互型マイクロアレイ電極を用いた測定システムも新規に開発し、充放電反応の進行中に活物質膜全体の導電度を測ることが出来るようになった。プロチウム個溶合金に代表されるインサーション型活物質は充放電反応に体積変化を伴い、条件によっては微粉化する事が知られる。電池活物質の性能を最大限に利用するために、導電度のin-situモニターに基づくプロセスの最適化が有効であると思われる。

  29. Micro-level tailoring of lithium ion extraction/insertion compounds and characterization of battery performance by microelectrode techniques with single particle electrodes

    UCHIDA Isamu, MATSUKI Kenzou, ITOH Takashi, NISHIZAWA Matsuhiko, URUSHIBATA Hiroaki, NISHINA Tatsuo

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: TOHOKU UNIVERSITY

    1998 - 1999

    More details Close

    The present research project has aimed development of new materials for the lithium-ion secondary battery, which is applicable to electric vehicles, based on two novel techniques, one being the citrate precursor method for material preparation and the other a microelectrode technique for electrochemical characterization of powdered battery materials. (1) Under collaboration, Yamagata group obtained lithium nickelate and spinel-related lithium manganese oxides with good cyclability by the modified citrate method, which enabled us to prepare systematically the multi-components oxides with micro-level tailoring and atomic-level homogeneity. (2) Tohoku group has developed microelectrode techniques which are very versatile in electrochemical characterization and rapid searching tailored samples even in a small quantity of micro-meter size particles. In-situ observation of particle splitting due to the mechanical instability accompanied by the insertion/extraction of lithium ions, high potential (〜5V) voltammetry to examine the electrochemical stability of the particle in organic solutions, determination of diffusion coefficients of lithium ions in the solid phase by AC and potential step method, and in-situ Raman spectroscopy and in-situ conductivity measurements during insertion of lithium ions with micro-array electrode technique also have been carried. Data thus obtained were feedbacked to the partners and effectively utilized in further R&D.

  30. マイクロ電極法による電気化学的プロチウム固溶過程の解析

    西澤 松彦, 内田 勇

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究(A)

    Institution: 東北大学

    1998 - 1998

    More details Close

    プロチウム固溶機能を有する各種合金材料への電気化学的なプロチウム挿・脱入反応を、マイクロ電極を用いたその場(in-situ)測定によって精密に評価し、水素2次電池用新規材料の探索と高性能化を目指した。研究の特色はマイクロ電極を用いる新規な電気化学システムにあり、合金粒子1個を測定対象とすることを可能とした。これにより、高分子結着剤や導電助剤が混在しない、合金粒子自体の電気化学挙動を精密に評価することが出来た。 LaNi_5、MmNi_5、Mg_2NiおよびアモルファスMgNiについて、直径50μm以下の球状粒子を測定対象とし10μm径のカーボンファイバーをキャピラリー化したガラス管に封入て作製したカーボンマイクロ電極をX-Y-Zマイクロマニュピュレーターで標的粒子に接触させた。サイクリックボルタンメトリーにおいては、従来のコンポジット膜では分離不可能な複数の同時進行反応を明瞭に観測できた。それぞれの反応に対応した電流ピークの電位掃引速度依存性、サイクル依存性などを調べ、速度論的に解析した。一方、ポテンシャルステップを与えた際の過渡電流応答から化学拡散係数等の速度論的パラメータの導出も試みた。LaNi_5粒子およびMmNi_5粒子についてプロチウム拡散係数を決定し、電気化学的ではない精密な方法で測定された値と一致する結果を得た。また、分極曲線や充放電曲線についても複合膜で得られる結果よりも明瞭であり、精密な材料評価が出来た。以上は電気化学的な挙動が単一粒子測定によって精密に行えることを示す結果であるが、それに加えて、粒子の形状を顕微鏡で直接観察出来ることも重要な利点である。結果として、充放電試験中に粒子が分裂することを観察し、電気化学応答の変化と対応づけて議論することを可能にした。

  31. 光インターカレーションによる構造規制界面の構築とその機能評価

    西澤 松彦, 内田 勇

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究(A)

    Institution: 東北大学

    1998 - 1998

    More details Close

    リチウムイオン2次電池の活物質材料として機能するLiMn_2O_4及び非晶質炭素に関して光電気化学応答を検討し,光エネルギーによって充電するタイプの新しい2次電池システムの構築に向けた基礎的知見を収集した。 LiMn_2O_4薄膜をスパッタリング法により透明電極(ITO)上に調製し,1MのLiClO_4を電解質とするプロピレンカーボネート溶液中で,光の照射に対する電流応答,電位応答,および電気伝導率の応答をその場(in situ)計測した。導電率測定は電極間隔0.01mmの交互型アレイ電極を用いて行いて行い,LiMn_2O_4にLiイオンがインターカレーションおよびデインターカレーションする反応過程には顕著な導電率変化が伴わないことを明らかにした。導電率は10^<-5>S/cmのオーダーであり,半導体に分類された。電位規制下でキセノン光を照射するとスパイク状のアノード電流が観測された。これは,n-型半導体電極に特有の応答であり,応答電流の強度は照射光強度にに比例した。溶液中にLiイオンが存在しない場合に電流応答が全く観測されないことから,光反応は明らかにLiイオンに関係しており,LiMn_2O_4結晶内へのインターカレーション反応であろうと推察された。しかし,通電荷量から算出したLiイオンのインターカレーション量は,膜全体が反応した場合の4%にすぎなかった。光応答電流は照射する光の波長に依存し,約470nm以下の波長の光によって誘起されることがわかった。この値から計算される半導体としてのバンドギャップは2.64eVであり,マンガン系酸化物にたいして妥当な値である。

  32. 精密に構造制御した半導体ナノ粒子積層膜の調製と光電気化学的評価

    西澤 松彦

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 奨励研究(A)

    Institution: 東北大学

    1997 - 1998

    More details Close

    化学的に安定な化合物半導体であるCdSの超微粒子を金単結晶の(111)面上に固定し、走査プローブ顕微鏡による電子構造解析を個々の超微粒子に対して行い、量子サイズ効果の実験的検証に成功した。超微粒子の固定はアミノチオールで金表面およびCdS粒子表面を修飾しておき、これらをグルタルアルデヒドで架橋しておこなった。STM探針を標的粒子状に固定し、V-I曲線からバンドギャップを算出した。粒子サイズを予めSTM画像として評価しておくことにより、粒子サイズとバンドギャップとの関係を系統的に調べることが出来た。結果は、理論的予測を定量的に再現するものであった。過去の研究は粒径分布を持つコロイド溶液の吸収スペクトルから見積もる平均値に基づいて議論されていた。これに対し、本研究はサイズ既知の粒子1個に対して行われており、すなわち初めて量子サイズ効果の厳密な実験的検証が出来たと言える。さらにこの結果を発展させ、CdS超微粒子積層電極の光電気化学特性を、積層数、粒子間距離に対応させて議論し、半導体超微粒子間での電子ホッピングのダイナミクスに対する理論展開を行った。 一方、アンダーポテンシャル析出法によって、CdS超薄膜を電気化学的にエピタキシャル成膜させる技術を開発し、原子サイズで制御された膜厚とバンドギャップとの相関付けに成功した。金単結晶の(111)面上に水溶液からCdとSを交互にアンダーポテンシャルデポジッションさせ、厳密な意味で原子レベルの膜厚制御を行った。こうして得られた膜厚の異なる(積層数の異なる)CdS超薄膜のバンドギャップをアクションスペクトルから計算し、二次元の量子サイズ効果について理論構築も含めて詳細に議論した。

  33. Preparation, Characterization and Application of Semiconductor Nanoparticulate Films

    YONEYAMA Hiroshi, NISHIZAWA Matsuhiko, TORIMOTO Tsukasa

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Osaka University

    1995 - 1996

    More details Close

    Size-quantized semiconductor nanocrystals possess transient properties from bulk materials to molecules and have been very interesting research subjects. Many researches have been performed using suspended particles in solution. We have investigated preparation methods of nanoparticle films and properties of the prepared films. The following results were obtained in the present study. (1) Immobilization of size-quantized titanium dioxide particles in polyvinylpyrrolidinone (PVPD) gel films was accomplished using electrophoretic deposition of titanium dioxide nanoparticles stabilized by PVPD in 2-propanol. The obtained gel films had high photocatalytic activities for reduction of nitrate ion and carbon dioxide to give ammonia and methanol, respectively. If these films were irradiated in the presence of both nitrate ion and carbon dioxide, urea was photoformed. (2) The films of titanium dioxide nanoparticle immobilized in silica matrices were prepared using the sol-gel technique with hydrolysis of Ti (OEt) _4 and Si (OEt) _4. The photoreduction of carbon dioxide on the prepared films gave carbon monoxide and formate as the reduction products and the ratio of those two kinds of products were influenced by the dielectric constant of the solvents used ; the fraction of formate increased with increase of the dielectric constant of solvent used. (3) The monolayr film of cadmium sulfide nanoparticles was prepared by covalently immobilizing cadimium sulfide nanoparticle to Au (111) with use of chemistry of self-assembling. STM measurements revealed that the obtained monolayr film was composed of the nanoparticles of 2-3 nm diameter without aggregation. Tunneling spectroscopy of a single nanoparticle could be performed, and the energy structure of cadmium sulfide nanoparticle was successfully determined.

  34. Novel Synthesis and Properties of Conducting Polymers

    YONEYAMA Hiroshi, MARTIN Charles R, TORIMOTO Tsukasa, NISHIZAWA Matsuhiko, KUWABATA Susumu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for international Scientific Research

    Institution: Osaka University

    1995 - 1996

    More details Close

    Composites of LiMn_2O_4 and polypyrrole were successfully synthesized in nanotubules, and nanotubules composites were found to possess very high activities as the electrode materials for lithium secondary batteries. The nanotubule composite electrodes were prepared using a commercially available alumina membrane which has cylindical pores (200nm, diameter) of 20x10^<10> pores/cm^2 as a template. First, Li Mn_2O_4 was synthesized in the pores and then pyrrole was polymerized in the pores using the oxide as an oxidizing agent. The nanotubules composite of polypyrrole and LiMn_2O_4 showed the greater performances as a cathode active material for lithium secondary battery than that of a conbentional LiMn_2O_4 thin film. This enhanced performances was mostly indebted to a high specific surface area of the nanotubules electrode and to the function of polypyrrole as a conducting matrix. The effectiveness of this approach has been demonstrated also for other composites such as polyaniline and V_2O_5 and polythiophene and carbon. The nanotubules of polypyrrole was found to work as an excellent matrix for immobilizing enzymes at a high concentration. The array of nano-capsuled enzyme worked as a high-sensitive and-selective enzyme sensor. The conclusion is derived from this international joint project that the composites formation of conducting polymers with other materials such as metal oxides and enzymes is useful as the means of developing novel functions, and the nano-structuring of these composites is an effective way to enhance thir performance.

  35. Study on Electroanalytical Chemistry Using Microelectrode Competitive

    1994/04 -

Show all Show first 5

Social Activities 16

  1. 体になじむゲル電極

    2014/06/16 -

  2. バイオ発電 果物、紙で発電

    2013/01/20 -

  3. 甘みセンサー開発 CNTと酵素を活用

    2012/08/30 -

  4. 糖感知し光るLED素子

    2012/08/28 -

  5. ゲル上に電気回路 東北大グループが新技術

    2010/11/08 -

  6. 東北大 ゲルに電気回路

    2010/10/13 -

  7. シート状のミニ筋肉 動く培養細胞を開発

    2010/02/10 -

  8. 筋肉細胞を長時間観察

    2010/02/10 -

  9. 筋肉細胞 収縮詳しく観察

    2010/01/08 -

  10. 筋肉細胞運動1週間 東北大で成功

    2009/12/17 -

  11. サイエンスカフェ 「命の仕組みで機械動く」

    2006/11/05 -

  12. 界面分子制御の応用で人工物と生体パーツを融合

    2006/03 -

  13. 「血液の成分使いバイオ燃料電池」

    2005/05/13 -

  14. 「細胞傷つけず固定 東北大 チップ分析に寄与」

    2004/06/03 -

  15. 「芽はぐくむ研究室・独自の細胞チップ開発へ」

    2004/03/05 -

  16. 「東北大,細胞の新パターニング手法開発」

    2003/12/16 -

Show all Show first 5

Media Coverage 1

  1. ゲルに電極を印刷 細胞や組織になじむ電気デバイス

    JSTサイエンスニュース

    2010/10/13

    Type: Other

Other 12

  1. 皮膚系細胞の機械刺激応答を解析するための高伸縮性表皮電位計測システムの開発

    More details Close

    伸展などの機械刺激を印加できる培養皮膚表皮の評価システムを、高伸縮性ハイドロゲルで作製する培養基板と電極アレイ基板を組み合わせて実現する。これは、機械刺激で生じる皮膚疾患(アトピー性皮膚炎や床ずれなど)のメカニズムや、機械刺激による皮膚損傷治療のメカニズムを、機械刺激を加えながら表皮電位のモニタリングによって評価するシステムであり、皮膚疾患の解明と治療法開発の加速が期待できる。

  2. 導電性高分子ゲル電極の開発と細胞チップへの応用

    More details Close

    導電性高分子製の電極を使って筋神経接合部を再現する細胞チップの開発に取り組む。

  3. 導電性高分子による細胞/電極間接合技術の開発と応用

    More details Close

    筋肉細胞アッセイのためのフレキシブル電極の開発

  4. バイオ集積デバイスの開発

    More details Close

    バイオハイブリッドチップの開発

  5. 微小流路内におけるマルチ細胞の捕集固定技術の開発

    More details Close

    微小流路内におけるマルチ細胞の捕集固定技術の開発

  6. 分散型ナノ植え込み機器を活用した慢性心不全患者の統合的デバイス治療の開発

    More details Close

    バイオ燃料電池の体内利用に向けた基礎研究

  7. 電気化学的な新規リソグラフィー技術を搭載したバイオチップシステムの開発

    More details Close

    電気化学的な新規リソグラフィー技術を搭載したバイオチップシステムの開発

  8. 隔膜型エレクトロポレーションチップの開発

    More details Close

    隔膜型エレクトロポレーションチップの開発

  9. ナノテクノロジーによる機能的・構造的生体代替デバイスの開発

    More details Close

    バイオ燃料電池の開発

  10. 電気化学バイオリソグラフィーのバイオチップ応用

    More details Close

    電気化学バイオリソグラフィーのバイオチップ応用

  11. 細胞のネットワーク培養とシグナル伝達イメージング

    More details Close

    細胞のネットワーク培養とシグナル伝達イメージング

  12. 細胞の局所培養による隔膜型バイオデバイスの構築

    More details Close

    細胞の局所培養による隔膜型バイオデバイスの構築

Show all Show first 5