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Fundamentals of Innovative Atomic Resolution Field Emission Microscope and Development of Low Energy Electron Microscope

Research Project

Project/Area Number 18H01882
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 29030:Applied condensed matter physics-related
Research InstitutionToyota Physical and Chemical Research Institute

Principal Investigator

Saito Yahachi  公益財団法人豊田理化学研究所, フェロー事業部門, フェロー (90144203)

Co-Investigator(Kenkyū-buntansha) 中原 仁  名古屋大学, 工学研究科, 助教 (20293649)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Keywordsカーボンナノチューブ / ナノカーボン / 電子放出 / 電界放出 / 電界イオン顕微鏡 / 電子顕微鏡 / グラフェン / 干渉性 / 吸着分子
Outline of Final Research Achievements

Field emission microscopy (FEM) and field ion microscopy (FIM) observations of pentacene molecules adsorbed on a carbon nanotube (CNT) electron emitter were carried out. FEM images of pentacene molecules were thick fringes. In FIM, cocoon-shaped (allay-shaped) spots changed their positions, and paired cocoon-shaped spots in parallel each other were observed.
A low-energy projection electron microscope with a CNT emitter as a point electron source was experimentally fabricated, and microscope images of magnification of approximately 10,000 at acceleration voltages 200-300V. An evaluation of coherence of electrons emitted from CNT field emitters was tried by using an electron biprism manufactured for the present CNT-FEM apparatus.

Academic Significance and Societal Importance of the Research Achievements

カーボンナノチューブ(CNT)やグラフェンなどのナノカーボンからの電界電子放出では,炭素原子の電子軌道や吸着分子の原子分解能での観察,真空度への要求が厳しくない(通常の高真空環境でも動作可能)など,従来のタングステンなどの金属電子源での常識を覆す,特異で興味深い現象が明らかにされている。本研究では,このCNT電子源の特性を生かして,その表面に吸着した有機分子の挙動とその分子像の観察,CNTを電子源とする新しいタイプの低速投射型電子顕微鏡の試作を行い,新たな研究分野の開拓につながる知見を得た。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (6 results)

All 2021 2020 2019 Other

All Presentation (4 results) (of which Int'l Joint Research: 1 results) Book (1 results) Remarks (1 results)

  • [Presentation] Formation of Ultra-slender CNTs via Field Emission Discharge of CNT films2021

    • Author(s)
      Yahachi Saito, Koji Asaka
    • Organizer
      フラーレン・カーボンナノチューブ・グラフェン総合シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] FEM/FIMによるグラフェンエッジの電子軌道の観察2020

    • Author(s)
      齋藤弥八,星野 徹,中原 仁,安坂幸師,永井滋一,畑 浩一
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Electronic Orbitals and Spin-Polarization at Graphene Edge Revealed by Field Emission and Field Ion Microscopy2019

    • Author(s)
      Y. Saito, Y. Watanabe, T. Hoshino, H. Nakahara, S. Nagai, H. Ikemizu, K. Kunoh, K. Hata
    • Organizer
      第57回フラーレン・ナノチューブ・グラフェン総合シンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] Edge States of Graphene Revealed by Field Emission Microscopy2019

    • Author(s)
      Y. Saito, Y. Watanabe, T. Hoshino, H. Nakahara, S. Nagai, H. Ikemizu, K. Kunoh, K. Hata
    • Organizer
      Recent Progress in Graphene and 2D Materials Research
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Book] Nanostructured Carbon Electron Emitters and its Applications2021

    • Author(s)
      Yahachi Saito
    • Total Pages
      348
    • Publisher
      Jenny Stanford Publishing
    • ISBN
      9789814877626
    • Related Report
      2020 Annual Research Report
  • [Remarks] 公益財団法人 豊田理化学研究所

    • URL

      https://www.toyotariken.jp/

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report 2018 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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