2022 Fiscal Year Final Research Report
Analysis of plasmon induced plating reaction by spectroelectrochemical measurements
| Project/Area Number |
20K05564
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 34020:Analytical chemistry-related
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| Research Institution | Hiroshima Institute of Technology (2021-2022)
Osaka University (2020) |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 局在表面プラズモン共鳴 / 電気化学 / レーザー描画 / ナノ構造 / 銀めっき / 酸化還元反応 / プラズモン誘起還元反応 |
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| Outline of Final Research Achievements |
Mechanism and applications of plasmon induced plating (reduction) reactions, in which silver nanostructures were fabricated on gold-nanoparticle (AuNP) immobilized substrate by visible light irradiation, were investigated. Spectroelectrochemical analysis revealed that the potential of AuNP/ITO electrodes showed shifts in the negative direction toward the silver reduction potential by light irradiation, followed by deposition of silver nanostructures. Controlling the electrode potential, laser microfabrication of silver nanostructures and their electrochemical oxidation to silver ions could be conducted repeatedly. Plasmon induced plating reactions were successfully performed on some oxide semiconductor films and silver nanostructures showed a high electrical conductivity on a zinc oxide film.
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| Free Research Field |
物理化学，顕微分光，バイオセンシング
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| Academic Significance and Societal Importance of the Research Achievements |
貴金属ナノ構造のプラズモン共鳴を利用した化学反応について，基礎から応用まで研究が盛んである．本研究では反応メカニズムとともに，反応を定量的に解析するための分光電気化学的な新しいアプローチを示した点においても学術的意義が高く，センサーや光エネルギー変換などへの応用展開にもつながると期待される．また，ガラス基板以外の機能性材料表面への構造形成や，書き換え可能なレーザー微細描画など，プラズモンナノ材料を活用するために有用な新技術を提案することができた．
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