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Analysis of electronic structure by aloof beam EELS

Research Project

Project/Area Number 19K22106
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 InstitutionKyoto University

Principal Investigator

Kurata Hiroki  京都大学, 化学研究所, 教授 (50186491)

Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2020: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords電子エネルギー損失スペクトル / 走査型透過電子顕微鏡 / 価電子励起スペクトル / 電子エネルギー損失分光法 / 電子構造
Outline of Research at the Start

① 電子エネルギー損失分光法(EELS)を走査型透過電子顕微鏡(STEM)と組み合わせた
局所電子分光法において、入射電子プローブを直接試料に照射しないアルーフビーム法という新規の電子分光計測法の開発とそのスペクトル解析法を確立する。
② 新規に開発したアルーフビームEELS法を、触媒微粒子や金属ナノ粒子に適用し、単一
の粒子表面に吸着した有機分子の分析を行う。

Outline of Final Research Achievements

We clarified the characteristics of electron structure analysis by the aloof-beam EELS method, which measures the electron energy-loss spectrum from organic materials without suffering electron beam irradiation damage. In this measurement method, the importance of the retardation effect was found in the interaction between the organic material and the electron beam. We also succeeded in measuring the interaction between the surface plasmons polariton of metal nanorods and excitons of organic molecules. Furthermore, we used an under-sampling method as a method for measuring the inner-shell electron excitation spectrum with reduced electron beam damage, and succeeded in measuring the high energy resolution spectrum of the near-edge fine structure of organic materials.

Academic Significance and Societal Importance of the Research Achievements

有機材料に対する電子エネルギー損失スペクトルの計測において、電子線照射損傷が大きな課題であったが、それを解決もしくは低減する計測法が開発され、その特性が明らかにされたことは、これまで主に無機材料に適用が限られてきた局所状態分析法の可能性を広げるうえで意義がある。このような新しい分析法の開発は、社会的に有用な様々な有機材料を分析する基盤技術の進歩としても意義がある。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (7 results)

All 2021 2020 2019

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (5 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results)

  • [Journal Article] モノクロメータ搭載STEM-EELSによる局所電子状態分析2021

    • Author(s)
      治田充貴, 倉田博基
    • Journal Title

      顕微鏡

      Volume: 56 Pages: 73-80

    • NAID

      130008086746

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Study of C K-Edge High Energy Resolution Energy-Loss Near-Edge Structures of Copper Phthalocyanine and Its Chlorinated Molecular Crystals by First-Principles Band Structure Calculations2020

    • Author(s)
      Atsushi Yamaguchi, Takashi Nemoto, and Hiroki Kurata
    • Journal Title

      I. Phys. Chem. A

      Volume: 124 Issue: 9 Pages: 1735-1743

    • DOI

      10.1021/acs.jpca.9b10832

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] High spatial resolution electronic state analysis using monochromated STEM-EELS2021

    • Author(s)
      Hiroki Kurata, Takashi Nemoto and Mitsutaka Haruta
    • Organizer
      2021 Materials Research Society-Taiwan International Conference
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Electronic state analysis with monochromated STEM-EELS2021

    • Author(s)
      Hiroki Kurata, Takashi Nemoto and Mitsutaka Haruta
    • Organizer
      The 38th International Conference of the Microscopy Society of Thailand
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 銀ナノロッド表面プラズモンと励起子との相互作用2021

    • Author(s)
      川口知樹, 根本隆, 治田充貴, 倉田博基
    • Organizer
      日本顕微鏡学会 第77回学術講演
    • Related Report
      2020 Research-status Report
  • [Presentation] Valence electron excitation spectra of organic crystals by aloof beam EELS2020

    • Author(s)
      Hiroki Kurata
    • Organizer
      International Conference of the Microscopy Society of Thailand (MST37)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Aloofビームによる有機結晶の価電子励起EELS2019

    • Author(s)
      倉田博基, 白澤由理, 治田充貴, 根本隆
    • Organizer
      日本顕微鏡学会第75回学術講演会
    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2023-01-30  

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