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Investigation of observation conditions of Raman vibrational levels with atomic resolution by photoinduced force microscopy

Research Project

Project/Area Number 22K18970
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 29:Applied condensed matter physics and related fields
Research InstitutionOsaka University

Principal Investigator

Li Yanjun  大阪大学, 大学院工学研究科, 准教授 (50379137)

Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2023: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2022: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Keywords光誘起力顕微鏡
Outline of Research at the Start

本研究の目的は、物質表面の構造と振動準位を原子分解能で観察可能な次世代の近接場ラマン光学顕微鏡を開発すると共に、その原子分解能観察の条件を解明することにある。本研究により、従来の常識を覆す新しい物理現象や機能を発見できる。また、得られる知見は、触媒表面での課題や燃料電池の電極表面での課題、高感度ガスセンサーなどの課題を解決するだけでなく、さらに性能を向上させるための指針を与えてくれる。したがって、本研究は、将来の環境・エネルギー分野の発展を支える基礎研究として必要不可欠であり、持続可能な社会の発展に貢献する研究分野の推進を可能とする。

Outline of Final Research Achievements

(1) In order to excite Raman light efficiently, an enhanced electric field by gap mode is used. Copper phthalocyanine and pentacene molecules adsorbed on silver (Ag) surfaces were used as samples. A gold (Au)-coated tip was used as a metal probe. (2) We experimentally investigated the conditions under which the Raman force can be measured with the highest sensitivity. The Raman force was derived from the tip-to-sample distance dependence of the modulation component of the cantilever frequency shift. (3) We attempted to observe the Raman light distribution of copper phthalocyanine molecules with high resolution, but the signal-to-noise ratio was not sufficient and a clear Raman light signal was not obtained. Further study is needed on how to improve the signal-to-noise ratio further.

Academic Significance and Societal Importance of the Research Achievements

原子レベルでの物質と光との相互作用に関する科学は、学術的研究課題の宝庫である。本研究の成功により、従来の常識を覆す新しい物理現象や機能を発見できる。このような発見は、新しい概念に基づく新材料や新デバイスの創製につながると期待される。また、このような革新的な研究手法の出現は、光物性研究の仕方を質的に変える可能性がある。本研究は、21世紀の環境・エネルギー分野の発展を支える基礎的研究として必要不可欠であり、持続可能な社会の発展に貢献する触媒研究や材料開発研究の飛躍的な推進を可能とする。

Report

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

    (9 results)

All 2023 2022 Other

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (4 results) (of which Int'l Joint Research: 3 results) Remarks (2 results)

  • [Journal Article] Study of CO Molecules on Pd/Al2O3/NiAl(110) Surface by Atomic Force Microscopy and Kelvin Probe Force Microscopy2023

    • Author(s)
      5.Shanrong Zou, Jiuyan Wei, Qiang Zhu, Hongqian Sang, Yasuhiro Sugawara, and Yan Jun Li
    • Journal Title

      Journal of Nanoparticle Research

      Volume: 25 Issue: 7

    • DOI

      10.1007/s11051-023-05781-8

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Local Spectroscopic Imaging of a Single Quantum Dot in Photoinduced Force Microscopy2022

    • Author(s)
      Junsuke Yamanishi, Hidemasa Yamane, Yoshitaka Naitoh, Yan Jun Li, and Yasuhiro Sugawara
    • Journal Title

      Appl. Phys. Lett.

      Volume: 120 Issue: 16 Pages: 161601-161601

    • DOI

      10.1063/5.0088634

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nanoscale optical imaging with photoinduced force microscopy in heterodyne amplitude modulation and heterodyne frequency modulation modes2022

    • Author(s)
      Junsuke Yamanishi, Yan Jun Li, Yoshitaka Naitoh and Yasuhiro Sugawara
    • Journal Title

      Journal of Photochemistry & Photobiology, C: Photochemistry Reviews

      Volume: 52 Pages: 100532-100532

    • DOI

      10.1016/j.jphotochemrev.2022.100532

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] High-Low Frequency Kelvin Probe Force Spectroscopy for Measuring the Interface State Density2023

    • Author(s)
      Yasuhiro Sugawara and Yan Jun Li
    • Organizer
      9th Multifrequency AFM Conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurement of spatially resolved surface photovoltage on TiO2(110) by ac bias KPFM2022

    • Author(s)
      Masato Miyazaki, Yasuhiro Sugawara and Yan Jun Li
    • Organizer
      The 23rd Conference on Non-Contact Atomic Force Microscopy (NC-AFM)C
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Atomic-scale Optical Properties of Pentacene Molecules Measured by Photoinduced Force Microscopy (PiFM)2022

    • Author(s)
      Yasuhiro Sugawara, Tatsuya Yamamoto, and Yan Jun Li
    • Organizer
      The 23rd Conference on Non-Contact Atomic Force Microscopy (NC-AFM)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 交流電圧制御法KPFMとEFMの複合による光起電力・接触電位差・静電容量の同時測定2022

    • Author(s)
      宮崎 雅大、能登 健太、菅原 康弘、李 艶君
    • Organizer
      2022年第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Research-status Report
  • [Remarks] 大阪大学大学院工学研究科応用物理学専攻極限計測・ナノサイエンス領域

    • URL

      http://nanophysics.ap.eng.osaka-u.ac.jp/liyanjun/

    • Related Report
      2023 Annual Research Report
  • [Remarks] 大阪大学大学院工学研究科物理学系専攻応用物理学コース極限計測・ナノサイエンス領域

    • URL

      http://nanophysics.ap.eng.osaka-u.ac.jp/liyanjun/

    • Related Report
      2022 Research-status Report

URL: 

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

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