2021 Fiscal Year Final Research Report
Development of vibrational spectro-electrochemistry utilizing infrared plasmonics
| Project/Area Number |
20K22518
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund |
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| Review Section |
0501:Physical chemistry, functional solid state chemistry, organic chemistry, polymers, organic materials, biomolecular chemistry, and related fields
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Morichika Ikki 東京大学, 生産技術研究所, 助教 (60885391)
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| Project Period (FY) |
2020-09-11 – 2022-03-31
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| Keywords | 振動分光 / 非線形分光 / 電気化学 / プラズモニクス |
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| Outline of Final Research Achievements |
Metal nanostructures that exhibit plasmon resonance in the infrared region and can also act as working electrodes were designed by electromagnetic field analysis based on the finite-difference time-domain method. The designed nanostructures were fabricated by electron beam lithography processes, which exhibit desired plasmon resonance confirmed by infrared spectroscopy. A nonlinear infrared spectroscopy system for measurement of the CO2 reduction reaction was constructed. By using the system, the transient absorption spectra of liquid-phase CO2 molecules and the vibrational relaxation dynamics were successfully observed.
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| Free Research Field |
光物理化学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で開発した手法の特徴は，赤外域でプラズモン共鳴を示す金属ナノ構造を作用電極として用いることで，電極表面における分子の構造やダイナミクスの高感度計測を可能とする点にある．電気化学反応のメカニズムを解明する上で反応中間体に関する知見は非常に重要であり，本手法により反応中間体を高感度に捉えることができれば，反応メカニズムの解明，さらには反応の効率や選択性を高めるための指標が得られると期待される．
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