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Developing the electron tomography for correct reconstructions of three-dimensional shape and density of materials based on elucidation of the multiple scattering phenomenon of electron beams

Research Project

Project/Area Number 19H02600
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 29020:Thin film/surface and interfacial physical properties-related
Research InstitutionOsaka University

Principal Investigator

Yamasaki Jun  大阪大学, 超高圧電子顕微鏡センター, 教授 (40335071)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2019: ¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
Keywords電子線トモグラフィー / 密度定量 / 多重散乱 / 非線形強度減衰 / 透過率減衰 / 電子顕微鏡 / 電子線透過率
Outline of Research at the Start

物質に入射した電子線の多重散乱がもたらす電子顕微鏡像への影響を精密に計測し、像強度と物質厚さの関係を定量解明する。加速電圧80kV~3000kVという幅広い条件で、様々な組成の物質を用いて電子線の散乱角度分布とTEM/STEM像強度の厚さ変化を系統的に計測し、実験結果を高精度かつ幅広く再現するユニバーサル関数の導出を目指す。この関数形に基づき、未知組成の材料内部の密度分布を正しく三次元再構成できるアルゴリズムを開発する。これによってナノ・ミクロンスケールの結晶・非結晶材料に対し、その形状だけでなく内部密度まで正しく三次元計測する手法、すなわち「密度定量トモグラフィー」の確立を目的とする。

Outline of Final Research Achievements

Manufacturing a whole-angle-tilt sample holder, developing a mounting technique for submicron-sized samples, and devising a new mutual alignment algorithm for a tomographic tilt series were achieved for high-precision reconstructions of three-dimensional (3D) shapes of samples. Moreover, based on the precise measurements for the nonlinear relationship between material’s thickness and image intensity in electron micrographs, the procedure of correcting the nonlinearity in experimental images including noise was established. Integrating all the achievements, the method to obtain correct 3D density of materials by electron tomography, which is the purpose of this project, was successfully established.

Academic Significance and Societal Importance of the Research Achievements

長年にわたり物質厚さと電子顕微鏡像強度の関係式が未解明であったが、電子顕微鏡の2大観察方式であるTEM像もSTEM像も数式で表せることになり、高エネルギー電子の多重散乱過程の理解につながる学術的意義のある成果が得られた。また汎用電子顕微鏡の観察スケール(ナノメーター)とX線による観察スケール(マイクロメーターからミリメーター)をつなぐサブミクロンスケールの物質の三次元構造を高精度に観察できるようになったため、そのサイズの物質群を活用した科学技術や応用技術への貢献が期待できる。

Report

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

    (23 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (19 results) (of which Int'l Joint Research: 6 results,  Invited: 4 results)

  • [Int'l Joint Research] National Research Council/University of Alberta(カナダ)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Quasi-static 3D structure of graphene ripple measured using aberration-corrected TEM2021

    • Author(s)
      Segawa Yuhiro、Yamazaki Kenji、Yamasaki Jun、Gohara Kazutoshi
    • Journal Title

      Nanoscale

      Volume: 13 Issue: 11 Pages: 5847-5856

    • DOI

      10.1039/d1nr00237f

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Progress in environmental high-voltage transmission electron microscopy for nanomaterials2020

    • Author(s)
      Tanaka Nobuo、Fujita Takeshi、Takahashi Yoshimasa、Yamasaki Jun、Murata Kazuyoshi、Arai Shigeo
    • Journal Title

      Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences

      Volume: 378 Issue: 2186 Pages: 20190602-20190602

    • DOI

      10.1098/rsta.2019.0602

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Intensity Attenuation in TEM Images with Increasing Thickness and Its Influence on Tomography2019

    • Author(s)
      山﨑 順
    • Journal Title

      KENBIKYO

      Volume: 54 Issue: 3 Pages: 149-152

    • DOI

      10.11410/kenbikyo.54.3_149

    • NAID

      130007783741

    • ISSN
      1349-0958, 2434-2386
    • Year and Date
      2019-12-30
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 急峻なエッジ近傍に見られるTEM像コントラス トの解析2022

    • Author(s)
      山﨑 順,林田 美咲,Malac Marek
    • Organizer
      日本顕微鏡学会 第78回学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 超高圧STEM像強度解析を活用したAl製磁気 ディスク基板中のめっき欠陥の立体解像2022

    • Author(s)
      西久保 英郎,佐々木 宏和,村田 拓哉,米光 誠, 兒島 洋一,荒井 重勇,山本 剛久,山﨑 順
    • Organizer
      日本顕微鏡学会 第78回学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] TEM/STEM Intensity Modulation with Increasing Thickness Induced by Electron Multiple Scattering Phenomena in Materials2021

    • Author(s)
      Jun Yamasaki, Hideo Nishikubo, Hirokazu Sasaki, and Shigeo Arai
    • Organizer
      2nd Canada-Japan Microscopy Societies Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Quantitative Analysis of Intensity Attenuation with Increasing Thickness in TEM and STEM Images2021

    • Author(s)
      Jun Yamasaki, Hideo Nishikubo, Hirokazu Sasaki, and Shigeo Arai
    • Organizer
      International Conference on Materials and Systems for Sustainability 2021 (ICMaSS2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Improved resolution in rapid electron tomography based on the image sharpness measurement2021

    • Author(s)
      Tomohito Ishii and Jun Yamasaki
    • Organizer
      13th International Symposium on Atomic Level Characterizations for New Materials and Devices '21 (ALC'21)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] HVEMトモグラフィー高速化の実現と展望2021

    • Author(s)
      山﨑 順、石井智仁
    • Organizer
      日本顕微鏡学会 第64回シンポジウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 画像鮮鋭度計測に基づく高速トモグラフィー再構成の分解能向上2021

    • Author(s)
      石井智仁、山﨑 順
    • Organizer
      日本顕微鏡学会 第77回学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 電子線トモグラフィーにおける密度定量化手法へのノイズの影響除去2021

    • Author(s)
      照屋海登、山﨑 順
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 電子顕微鏡によるミクロン/ナノスケール3次元計測の進展2020

    • Author(s)
      山﨑 順
    • Organizer
      2020年 日本表面真空学会 学術講演会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 電子線トモグラフィーにおける形状と密度の定量的再構成とダイレクト・ディテクターを用いた高速化2020

    • Author(s)
      山﨑 順
    • Organizer
      日本顕微鏡学会 第63回シンポジウム
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 全角傾斜トモグラフィーにおけるマーカーフリーアライメント手法の開発2020

    • Author(s)
      照屋 海登、山﨑 順、加藤 丈晴、畑中 修平、馬場 則男
    • Organizer
      日本顕微鏡学会 第63回シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] 超高圧STEM像強度の厚さ依存性定量解析2020

    • Author(s)
      山﨑 順、西久保 英郎、佐々木 宏和、荒井 重勇、保田 英洋
    • Organizer
      日本顕微鏡学会 第75回学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 全角傾斜トモグラフィーにおけるマーカーレスアライメント手法の開発2020

    • Author(s)
      照屋 海登、山﨑 順、加藤 丈晴、畑中 修平、馬場 則男
    • Organizer
      日本顕微鏡学会 第75回学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Precise analysis of transmission attenuation in mass-thickness contrast TEM images2020

    • Author(s)
      Jun Yamasaki, Yuya Ubata, and Hidehiro Yasuda
    • Organizer
      12th Asia-Pacific Microscopy conference (APMC-2020)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Precise Measurements of Transmission Attenuation in Mass-Thickness Contrast TEM Images2019

    • Author(s)
      Jun Yamasaki, Yuya Ubata, and Hidehiro Yasuda
    • Organizer
      Microscopy and Microanalysis 2019 Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Precise analysis of intensity attenuation with increasing thickness in TEM images2019

    • Author(s)
      Jun Yamasaki, Yuya Ubata, and Hidehiro Yasuda
    • Organizer
      the 6th International Symposium on Advanced Microscopy and Theoretical Calculations (AMTC6)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] TVノルム最小化を用いた密度定量トモグラフィにおけるノイズ問題解決法2019

    • Author(s)
      照屋 海登、山崎 順、加藤 丈晴、藤田 直弘、馬場 則男
    • Organizer
      日本物理学会 2019年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] TEM像強度減衰曲線の精密解析と多重散乱に基づく解釈2019

    • Author(s)
      山﨑 順、宇畑雄哉、保田英洋
    • Organizer
      日本顕微鏡学会 第75回学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 電子線トモグラフィーの非線形透過率補正におけるノイズ問題の解決法2019

    • Author(s)
      照屋 海登、山崎 順、加藤 丈晴、藤田 直弘、馬場 則男
    • Organizer
      日本顕微鏡学会 第75回学術講演会
    • Related Report
      2019 Annual Research Report

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

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