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Preparation of Quantum Dot Hybrid Arrays for the Application to Light Conversion Systems

Research Project

Project/Area Number 22K19083
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 36:Inorganic materials chemistry, energy-related chemistry, and related fields
Research InstitutionNagoya University

Principal Investigator

Torimoto Tsukasa  名古屋大学, 工学研究科, 教授 (60271029)

Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2023: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2022: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywordsイオン液体 / 金属スパッタリング / 単粒子層 / 複合ナノ粒子 / 金属ー半導体複合体 / スパッタ蒸着 / 電気化学特性 / ヘテロ接合 / 異方性形状ナノ粒子 / 光触媒
Outline of Research at the Start

本研究は、イオン液体に減圧下で金属スパッタ蒸着することで、単分散な金属ナノ粒子を高精度に作製する手法(イオン液体/金属スパッタ蒸着法)を応用し、イオン液体表面に一次元の異方性をもつヘテロ接合ナノロッド粒子を精密に作製する。さらに、ロッド粒子の異方性をそろえて三次元的に電極上に積層して、新規なナノ粒子集積体を創製する。

Outline of Final Research Achievements

A monolayer film composed of metal-semiconductor composite nanoparticles was fabricated by sequentially sputter-depositing metals onto an ionic liquid surface. At first, Au was sputter-deposited onto the ionic liquid, forming a monolayer film of Au nanoparticles on the liquid surface. Subsequently, Ni was sputter-deposited onto this film and then air-oxidized to produce a monolayer film of Au-NiOx composite nanoparticles. This film was transferred onto a glassy carbon electrode substrate using a horizontal deposition method. The cyclic voltammogram of the Au-NiOx composite revealed an oxidation peak corresponding to the oxidation of Ni(II) to Ni(III), in addition to the reduction peak of the AuOx monolayer on the Au surface. This confirms the formation of a monolayer film composed of Au-NiOx metal-semiconductor composite nanoparticles using a method involving sequential metal sputtering onto an ionic liquid.

Academic Significance and Societal Importance of the Research Achievements

金属・半導体からなるナノ粒子は、サイズや形状に依存して物理化学特性が大きく異なる。さらにナノ粒子を異なる材料と複合化させると、ナノ粒子の形状を維持したまま特性を変調でき、触媒活性・光特性の向上を目指して活発に研究されている。本研究では、従来の液相化学合成法とは異なるイオン液体/金属スパッタ蒸着法を用い、新らたな複合ナノ粒子の合成法を確立した。さらに得られた複合ナノ粒子の自己組織化による単粒子層形成を確認できた。この方法をさらに発展させることで、従来法では作製困難な複合ナノ粒子集積体が作製できるようになり、新たな機能材料開発の手法になると期待される。

Report

(2 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (6 results)

All 2023 2022

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results)

  • [Journal Article] Electrocatalyst Fabrication Using Metal Nanoparticles Prepared in Ionic Liquids2023

    • Author(s)
      Yu Yao, Tetsuya Tsuda, Tsukasa Torimoto, and Susumu Kuwabata
    • Journal Title

      The Chemical Record

      Volume: 23 Issue: 8

    • DOI

      10.1002/tcr.202200274

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Controlling optical properties and electronic energy structure of I-III-VI semiconductor quantum dots for improving their photofunctions2023

    • Author(s)
      Tsukasa Torimoto, Tatsuya Kameyama, Taro Uematsu, and Ssusumu Kuwabata
    • Journal Title

      Journal of Photochemistry and Photobiology C: Photochemistry Reviews

      Volume: 54 Pages: 100569-100569

    • DOI

      10.1016/j.jphotochemrev.2022.100569

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Composition control of alloy nanoparticles consisting of bulk-immiscible Au and Rh metals via an ionic liquid/metal sputtering technique for improving their electrocatalytic activity2022

    • Author(s)
      Kazutaka Akiyoshi, Yumezo Watanabe, Tatsuya Kameyama, Tokuhisa Kawawaki, Yuichi Negishi, Susumu Kuwabata and Tsukasa Torimoto
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 24 Issue: 39 Pages: 24335-24344

    • DOI

      10.1039/d2cp01461k

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] サイズ・組成により自在に制御できる多元量子ドットの光機能2023

    • Author(s)
      鳥本 司
    • Organizer
      電気化学会第90回大会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Preparation of Group I-III-VI-based Quantum Dots with Less Toxicity and Their Photofunctions2022

    • Author(s)
      Tsukasa Torimoto
    • Organizer
      INSPINSA2022 (The 12th International Seminar on New Paradigm and Innovation on Natural Sciences and its Application)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] イオン液体/金属スパッタ法によるコアシェル構造 Au@Ni ナノ粒子の作製と組成に依存する尿素酸化活性2022

    • Author(s)
      伊藤 由実, 秋吉 一孝, 亀山 達矢, 桑畑 進, 鳥本 司
    • Organizer
      第73回コロイドおよび界面化学討論会
    • Related Report
      2022 Research-status Report

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Published: 2022-07-05   Modified: 2025-01-30  

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