• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Real-time and real-space visualization of super-atom molecular orbital (SAMO)

Research Project

Project/Area Number 19K05182
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 28010:Nanometer-scale chemistry-related
Research InstitutionUniversity of Tsukuba

Principal Investigator

Sasaki Masahiro  筑波大学, 数理物質系, 教授 (80282333)

Co-Investigator(Kenkyū-buntansha) 山田 洋一  筑波大学, 数理物質系, 准教授 (20435598)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords超原子電子軌道(SAMO) / 電界放出顕微鏡(FEM) / 実時間イメージング / 実空間イメージング / エネルギー分析 / フラーレン / 半導体有機分子 / 超原子分子軌道(SAMO) / 電子輸送 / 炭化タングステン / 電子状態の可視化 / フラーレン(C60) / 実時間計測
Outline of Research at the Start

本研究は、電界放出顕微鏡(FEM)を応用して、分子の外側に、分子をあたかも原子核とみなした電子軌道である超原子電子軌道(SAMO)の実時間、実空間イメージング法を開拓するものである。FEMは尖鋭化した金属針先端から放出された電子の空間分布の拡大投影であり、極めて簡便な電子状態計測法である。SAMO同士が重なることでこれによって、自由電子的なバンドを作ることが可能であり、本研究により、これまであまり注目されてこなかったSAMO軌道を活用したエレクトロニクスの可能性を検討することが可能となる。

Outline of Final Research Achievements

The purpose of this study is to develop real-time and real-space visualizing methods of empty states of semiconducting organic molecules such as Super-atom Molecular Orbital (SAMO) of fullerenes by using field electron microscopy (FEM).
We have demonstrated that stable W carbide layers prepared by heating adsorbed C60 act as an excellent barrier layer for electron tunneling and that many large empty states of organic molecules and also their motions including rotations of and transitions between electronic states are successfully visualized in real-time and real-space manners.

Academic Significance and Societal Importance of the Research Achievements

FEMは尖鋭化した金属針先端から放出される電子の投影であり、先端を構成する表面の仕事関数分布を反映した像が得られる。ここで、金属針先端に分子を吸着させると、吸着分子の幾何構造に対応したと推定されるパターンが現れることが観測されることがあるが、その起源は解明されていなかった。我々は、C60 SAMOを出発点として、一般の分子の軌道の形状がそのまま実時間・実空間像として画像化できることを見いだした。分子間の電荷移動等の現象を簡易的に可視化できることになる。この手法は、化学反応過程、半導体分子間の伝導過程の原子レベルでの直接計測など応用の広い範囲で活用でき、大きな波及効果が期待できる。

Report

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

    (13 results)

All 2022 2021 2020 2019

All Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 3 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] Photoemission Tomography of a One-Dimensional Row Structure of a Flat-Lying Picene Multilayer on Ag(110)2022

    • Author(s)
      Iwasawa Masato、Kobayashi Shinnosuke、Sasaki Masahiro、Hasegawa Yuri、Ishii Hiroyuki、Matsui Fumihiko、Kera Satoshi、Yamada Yoichi
    • Journal Title

      The Journal of Physical Chemistry Letters

      Volume: 13 Issue: 6 Pages: 1512-1518

    • DOI

      10.1021/acs.jpclett.1c03821

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Direct Visualization of Nearly Free Electron States Formed by Superatom Molecular Orbitals in a Li@C<sub>60</sub> Monolayer2021

    • Author(s)
      Sumi Naoya、Kuklin Artem V.、Ueno Hiroshi、Okada Hiroshi、Ogawa Tomoyuki、Kawachi Kazuhiko、Kasama Yasuhiko、Sasaki Masahiro、Avramov Pavel V.、?gren Hans、Yamada Yoichi
    • Journal Title

      The Journal of Physical Chemistry Letters

      Volume: 12 Issue: 32 Pages: 7812-7817

    • DOI

      10.1021/acs.jpclett.1c02246

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Origin of monochromatic electron emission from planar-type graphene/hexagonal boron nitride/n-type silicon electron emission devices2021

    • Author(s)
      Tomoya Igari, Masayoshi Nagao, Kazutaka Mitsuishi, Masahiro Sasaki, Yoichi Yamada and Katsuhisa Murakami
    • Journal Title

      Physical Review Applied

      Volume: 15 Issue: 1 Pages: 014044-014044

    • DOI

      10.1103/physrevapplied.15.014044

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Mechanism of Highly Efficient Electron Emission from Graphene/Oxide/Semiconductor Structure2020

    • Author(s)
      Katsuhisa Murakami, Manabu Adachi, Joji Miyaji, Ryo Furuya, Masayoshi Nagao, Yoichi Yamada, Yoichiro Neo, Yoshinori Takao, Masahiro Sasaki, and Hidenori Mimura
    • Journal Title

      ACS Appl. Electron. Mater.

      Volume: 2 Issue: 7 Pages: 2265-2273

    • DOI

      10.1021/acsaelm.0c00449

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Exciton Dissociation and Electron Transfer at a Well-defined Organic Interface of an Epitaxial C60 layer on a Pentacene Single Crystal2020

    • Author(s)
      Iwasawa, Masato; Tsuruta, Ryohei; Nakayama, Yasuo; Sasaki, Masahiro; Hosokai, Takuya; Lee, Sunghee; Fukumoto, Keiki; *Yamada, Yoichi
    • Journal Title

      J. Phys. Chem. C

      Volume: 124 Issue: 25 Pages: 13572-13579

    • DOI

      10.1021/acs.jpcc.0c02796

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Highly Monochromatic Electron Emission from Graphene/Hexagonal Boron Nitride/Si Heterostructure2019

    • Author(s)
      Murakami Katsuhisa、Igari Tomoya、Mitsuishi Kazutaka、Nagao Masayoshi、Sasaki Masahiro、Yamada Yoichi
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 12 Issue: 3 Pages: 4061-4067

    • DOI

      10.1021/acsami.9b17468

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] High-performance planar-type electron source based on a graphene-oxide-semiconductor structure2019

    • Author(s)
      Murakami Katsuhisa、Miyaji Joji、Furuya Ryo、Adachi Manabu、Nagao Masayoshi、Neo Yoichiro、Takao Yoshinori、Yamada Yoichi、Sasaki Masahiro、Mimura Hidenori
    • Journal Title

      Applied Physics Letters

      Volume: 114 Issue: 21 Pages: 213501-213501

    • DOI

      10.1063/1.5091585

    • NAID

      120007127634

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Li@C70の超原子分子軌道(SAMO)の直接計測(2)2022

    • Author(s)
      6.清水 好葉、鶴田 諒平、佐々木 正洋、北畠 大樹、河地 和彦、笠間 泰彦、美齊津 文典、上野 裕、山田 洋一
    • Organizer
      2022年第69回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] C60分子軌道を介した電界電子放出パターン形成機構の解明2021

    • Author(s)
      古澤怜也、鶴田諒平、佐々木正洋、山田洋一
    • Organizer
      2021年第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Development of Planar-type Electron Emission Device Based on a Graphene/h-BN Heterostructure2019

    • Author(s)
      Tomoya Igari, Masayoshi Nagao, Yoichi Yamada, Masahiro Sasaki and Katsuhisa Murakami
    • Organizer
      32nd International Vacuum Nanoelectronics Conference and 12th International Vacuum Electron Sources Converence (IVNC-IVESC 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Energy Distribution of Electrons Field-Emitted from Graphitized Pencil Lead2019

    • Author(s)
      Yuji Nishiyama, Tomoya Igari, Yusuke Hyuga, Manabu Adachi, Nobuhiko Kobayashi, Yoichi Yamada, Masahiro Sasaki
    • Organizer
      32nd International Vacuum Nanoelectronics Conference and 12th International Vacuum Electron Sources Converence (IVNC-IVESC 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Graphene/h-BNを用いた原子層物質積層平面型電子源2019

    • Author(s)
      猪狩 朋也、長尾 昌善、三石 和貴、佐々木 正洋、山田 洋一、村上 勝久
    • Organizer
      2019年応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Nano-carbon materials from the view points of practical field electron emitters2019

    • Author(s)
      Masahiro Sasaki
    • Organizer
      International Conference on Multifunctional Materials (ICMM-2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi