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2022 Fiscal Year Final Research Report

Development of plasmonic spectroscopy using nanostructured graphene

Research Project

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Project/Area Number 21K18874
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 28:Nano/micro science and related fields
Research InstitutionNagoya Institute of Technology

Principal Investigator

Ikeda Katsuyoshi  名古屋工業大学, 工学(系)研究科(研究院), 教授 (50321899)

Project Period (FY) 2021-07-09 – 2023-03-31
Keywordsグラフェン / プラズモン共鳴 / 表面増強効果
Outline of Final Research Achievements

In situ spectroscopic observation of electrochemical reactions on a carbon electrode should provide deep insights into reaction mechanisms at the molecular level. In this study, development of surface-enhanced spectroscopy using a nanostructured graphene was attempted in both visible and infrared regions. While plasmonic surface enhancement expected was not experimentally obtained in the infrared region, we found that enormous signal enhancement of Raman scattering in the visible region was induced by electrochemical potential application. This phenomenon was observed only when the graphene film contained atomistic defects. In addition, we developed a novel structure of cathodic electrodes based on the two-dimensional structure of graphene.

Free Research Field

表面分光学

Academic Significance and Societal Importance of the Research Achievements

本研究では、挑戦的研究課題らしく、研究の過程で予想を超えた成果を得ることが出来た。高感度な界面分光法としてこれまで用いられてきた表面増強ラマン散乱は、金属ナノ構造のプラズモン共鳴を利用しているため、耐久性が低いという実用面の問題があった。今回見出した表面増強効果は、グラフェンとAu基板界面で起こっていると考えられ、長期安定性を持つ現象であることが実験的に確認された。本成果はこれまで知られていない現象であると考えられ、基礎学術的にもその機構解明は興味が持たれ、実用的にも従来技術の課題を解決する新分光技術への展開が期待される。

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Published: 2024-01-30  

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