研究者詳細

顔写真

ベツテイヤダン　リバル　ジヨセ
Vettiyadan Rival Jose
Vettiyadan Rival Jose
所属
多元物質科学研究所　無機材料研究部門　精密無機材料化学研究分野
職名
特任研究員
学位

  • Ｐｈ．Ｄ．（University of Calicut）

  • Ｍ．Ｓ．（University of Calicut）

e-Rad 研究者番号
31032550

研究キーワード 3

  • electrocatalysis

  • Ligand engineering

  • nanocluster

論文 10

  1. Emergence of Nido-Icosahedral Superatomic Units in Iridium-Doped Silver Cluster Assemblies

    Tzu-Hao Chiu, Michael N. Pillay, Jose V. Rival, Yoshiki Niihori, Yuichi Negishi, Samia Kahlal, Jean-Yves Saillard, C. W. Liu

    Inorganic Chemistry　2026年8月31日

    DOI： 10.1021/acs.inorgchem.6c03151 　

  2. Bimetallic Nanocluster-Based Light-Emitting Diodes With High External Quantum Efficiency and Saturated Red Emission

    Rival, J.V., Chand, S., Jana, A., Nonappa, Biju, V., Pradeep, T., Rajamalli, P., Shibu, E.S.

    Advanced Materials　37　(35)　2025年

    DOI： 10.1002/adma.202507893 　

    ISSN：0935-9648 1521-4095

  3. The interplay of chromophore–spacer length in light-induced gold nanocluster self-assembly

    Jose V. Rival, Nonappa, Edakkattuparambil Sidharth Shibu

    Nanoscale　2024年

    DOI： 10.1039/D4NR01954G 　

  4. Platinum‐Grafted Twenty‐Five Atom Gold Nanoclusters for Robust Hydrogen Evolution

    Paloli Mymoona, Jose V. Rival, Nonappa, Edakkattuparambil Sidharth Shibu, Chinnaiah Jeyabharathi

    Small　2023年12月21日

    DOI： 10.1002/smll.202308610 　

    ISSN：1613-6810 1613-6829

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    <jats:title>Abstract</jats:title><jats:p>A robust hydrogen evolution is demonstrated from Au<jats:sub>25</jats:sub>(PET)<jats:sub>18</jats:sub>]<jats:sup>−</jats:sup> nanoclusters (PET = 2‐phenylethanethiol) grafted with minimal platinum atoms. The fabrication involves an electrochemical activation of nanoclusters by partial removal of thiols, without affecting the metallic core, which exposes Au‐sites adsorbed with hydrogen and enables an electroless grafting of platinum. The exposed Au‐sites feature the (111)‐facet of the <jats:italic>fcc</jats:italic>‐Au<jats:sub>25</jats:sub> nanoclusters as assessed through lead underpotential deposition. The electrochemically activated nanoclusters (without Pt loading) show better electrocatalytic reactivity toward hydrogen evolution reaction than the pristine nanoclusters in an acidic medium. The platinum‐grafted nanocluster outperformed with a lower overpotential of 0.117 V vs RHE (RHE = Reversible Hydrogen Electrode) compared to electrochemically activated nanoclusters (0.353 V vs RHE ) at 10 mA cm<jats:sup>−2</jats:sup> and is comparable with commercial Pt/C. The electrochemically activated nanoclusters show better reactivity at higher current density owing to the ease of hydrogen release from the active sites. The modified nanoclusters show unique supramolecular self‐assembly characteristics as observed in electron microscopy and tomography due to the possible metallophilic interactions. These results suggest that the post‐surface modification of nanoclusters will be an ideal tool to address the sustainable production of green hydrogen.</jats:p>

  5. Luminescent quantum dots: Synthesis, optical properties, bioimaging and toxicity

    Jeladhara Sobhanan, Jose V. Rival, Abdulaziz Anas, Edakkattuparambil Sidharth Shibu, Yuta Takano, Vasudevanpillai Biju

    Advanced Drug Delivery Reviews　2023年6月

    DOI： 10.1016/j.addr.2023.114830 　

    ISSN：0169-409X

  6. Precision Nanocluster‐Based Toroidal and Supertoroidal Frameworks Using Photocycloaddition‐Assisted Dynamic Covalent Chemistry

    Kavalloor Murali Lakshmi, Jose V. Rival, Pakath Sreeraj, Sindhu R. Nambiar, Chinnaiah Jeyabharathi, Nonappa, Edakkattuparambil Sidharth Shibu

    Small　2023年4月

    DOI： 10.1002/smll.202207119 　

    ISSN：1613-6810 1613-6829

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    Atomically precise nanoclusters (NCs) have recently emerged as ideal building blocks for constructing self‐assembled multifunctional superstructures. The existing structures are based on various non‐covalent interactions of the ligands on the NC surface, resulting in inter‐NC interactions. Despite recent demonstrations on light‐induced reversible self‐assembly, long‐range reversible self‐assembly based on dynamic covalent chemistry on the NC surface has yet to be investigated. Here, it is shown that Au<jats:sub>25</jats:sub> NCs containing thiolated umbelliferone (7‐hydroxycoumarin) ligands allow [2+2] photocycloaddition reaction‐induced self‐assembly into colloidal‐level toroids. The toroids upon further irradiation undergo inter‐toroidal reaction resulting in macroscopic supertoroidal honey‐comb frameworks. Systematic investigation using electron microscopy, atomic force microscopy (AFM), and electron tomography (ET) suggest that the NCs initially form spherical aggregates. The spherical structures further undergo fusion resulting in toroid formation. Finally, the toroids fuse into macroscopic honeycomb frameworks. As a proof‐of‐concept, a cross‐photocycloaddition reaction between coumarin‐tethered NCs and an anticancer drug (5‐fluorouracil) is demonstrated as a model photo‐controlled drug release system. The model system allows systematic loading and unloading of the drug during the assembly and disassembly under two different wavelengths. The results suggest that the dynamic covalent chemistry on the NC surface offers a facile route for hierarchical multifunctional frameworks and photocontrolled drug release.

  7. Precision nanoclusters: Promising materials for sensing, optoelectronics, and biology

    Rival, J.V., Mymoona, P., Shibu, E.S.

    Nanomaterials for Sensing and Optoelectronic Applications　2022年

    DOI： 10.1016/B978-0-12-824008-3.00009-6 　

  8. Self-Assembly of Precision Noble Metal Nanoclusters: Hierarchical Structural Complexity, Colloidal Superstructures, and Applications

    Rival, J.V., Mymoona, P., Lakshmi, K.M., Nonappa, Pradeep, T., Shibu, E.S.

    Small　17　(27)　2021年7月

    DOI： 10.1002/smll.202005718 　

    ISSN：1613-6810 1613-6829

  9. Light-Emitting Atomically Precise Nanocluster-Based Flexible QR Codes for Anticounterfeiting

    Rival, J.V., Mymoona, P., Vinoth, R., Mohan, A.M.V., Shibu, E.S.

    ACS Applied Materials and Interfaces　13　(8)　10583-10593　2021年3月3日

    出版者・発行元： American Chemical Society ({ACS})

    DOI： 10.1021/acsami.0c21127 　

    ISSN：1944-8244 1944-8252

  10. Light-Triggered Reversible Supracolloidal Self-Assembly of Precision Gold Nanoclusters

    Rival, J.V., Nonappa, Shibu, E.S.

    ACS Applied Materials and Interfaces　12　(12)　14569-14577　2020年3月3日

    出版者・発行元： American Chemical Society ({ACS})

    DOI： 10.1021/acsami.0c00328 　

    ISSN：1944-8244 1944-8252

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