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Analysis of electrostatic potential distribution of supported metal nanoparticles

Research Project

Project/Area Number 18H03845
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionKyushu University

Principal Investigator

Murakami Yasukazu  九州大学, 工学研究院, 教授 (30281992)

Co-Investigator(Kenkyū-buntansha) 赤嶺 大志  九州大学, 総合理工学研究院, 助教 (40804737)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥45,240,000 (Direct Cost: ¥34,800,000、Indirect Cost: ¥10,440,000)
Fiscal Year 2020: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
Fiscal Year 2019: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
Fiscal Year 2018: ¥26,000,000 (Direct Cost: ¥20,000,000、Indirect Cost: ¥6,000,000)
Keywords電子顕微鏡 / 電子線ホログラフィー / 触媒 / ナノ粒子 / 電気分極 / 帯電 / 電位分布 / 分極 / 回折 / 電子回折 / 触媒材料
Outline of Final Research Achievements

The objective of this study is to reveal the distribution of the electrostatic potential of metallic nanoparticle that is supported on a transition metal oxide (i.e., a system referred to as supported metal catalyst), and deepen understanding about the relationship between the potential distribution and the catalytic functionalities. For this purpose, the sensitivity of electron holography, which allows for the electrostatic potential mapping from a nanometer-scaled area, was improved. This method attained an accurate measurement of electric charges from individual nanoparticles.

Academic Significance and Societal Importance of the Research Achievements

担持触媒系は、有毒ガスの浄化、食糧生産に欠かせないアンモニアの合成、クリーンなエネルギー源としての水素の製造など、地球規模の課題・社会的な課題に関わる要素技術に欠かせない重要な材料である。担持触媒系に関わる重要な研究テーマの一つは、触媒反応の活性部位に関わる理解と言える。本研究は、電子顕微鏡(電子線ホログラフィー)を用いた局所領域の電位計測という観点で、この本質的な問題を追及した。その結果、従来の研究手段を上回る精度で、酸化物に担持された金属ナノ粒子が示す微弱な帯電の様子を明らかにすることができた。

Report

(4 results)
  • 2021 Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (26 results)

All 2021 2020 2019 2018

All Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 1 results) Presentation (19 results) (of which Int'l Joint Research: 4 results,  Invited: 14 results)

  • [Journal Article] Denoising Electron Holograms using the Wavelet Hidden Markov Model for Phase Retrieval-Applications to the Phase-shifting Method2021

    • Author(s)
      Takehiro Tamaoka, Yoshihiro. Midoh, Kazuo Yamamoto, Shodai Aritomi, Toshiaki Tanigaki, Masao Nakamura, Koji Nakamae, Masashi Kawasaki, Yasukazu Murakami
    • Journal Title

      AIP Advances

      Volume: 11 Issue: 2 Pages: 025135-025135

    • DOI

      10.1063/5.0027599

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Deep Convolutional Neural Network Image Processing Method Providing Improved Signal-to-Noise Ratios in Electron Holography2021

    • Author(s)
      Yusuke Asari, Shohei. Terada, Toshiaki Tanigaki, Yoshio Takahashi, Hiroyuki Shinada, Hiroshi Nakajima, Kiyoshi Kanie, Yasukazu Murakami
    • Journal Title

      Microscopy

      Volume: 70 Issue: 5 Pages: 442-449

    • DOI

      10.1093/jmicro/dfab012

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Electrostatic Potential Measurement in the Pt/TiO2 Interface using Electron Holography2021

    • Author(s)
      Hiroshi Nakajima, Toshiaki Tanigaki, Takaaki Toriyama, Mahito Yamamoto, Hidekazu Tanaka, Yasukazu Murakami
    • Journal Title

      J. Appl. Phys.

      Volume: 129 Issue: 17 Pages: 174304-174304

    • DOI

      10.1063/5.0046501

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] ウェーブレット隠れマルコフモデルを用いた電子線ホログラムの雑音除去2020

    • Author(s)
      御堂義博、中前幸治、品田博之、村上恭和
    • Journal Title

      顕微鏡

      Volume: 55 Pages: 53-59

    • NAID

      130007897877

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic flux density measurements from grain boundary phase in 0.1 at% Ga-doped Nd-Fe-B sintered magnet2020

    • Author(s)
      Cho Youngji、Sasaki Taisuke、Harada Ken、Sato Atsuko、Tamaoka Takehiro、Shindo Daisuke、Ohkubo Tadakatsu、Hono Kazuhiro、Murakami Yasukazu
    • Journal Title

      Scripta Materialia

      Volume: 178 Pages: 533-538

    • DOI

      10.1016/j.scriptamat.2019.12.030

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Suppressing Geometric Phase Shift Owing to Antiphase Boundaries in Dark-Field Electron Holography2019

    • Author(s)
      Cho Youngji、Niitsu Kodai、Midoh Yoshihiro、Nakamae Koji、Shindo Daisuke、Yang Jun-Mo、Murakami Yasukazu
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 60 Issue: 5 Pages: 698-703

    • DOI

      10.2320/matertrans.MC201809

    • NAID

      130007636518

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2019-05-01
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Self-assembled structure of dendronized CdS nanoparticles2019

    • Author(s)
      Nakajima Hiroshi、Matsuki Daichi、Fukunaga Yumi、Toriyama Takaaki、Shigematsu Koji、Matsubara Masaki、Kanie Kiyoshi、Muramatsu Atsushi、Murakami Yasukazu
    • Journal Title

      Microscopy

      Volume: 68 Issue: 4 Pages: 342-347

    • DOI

      10.1093/jmicro/dfz014

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] 電子線ホログラフィーによるナノ構造の電磁場解析~その自動化と高感度化2021

    • Author(s)
      村上恭和、小山朗、高橋由夫、明石哲也、市橋史朗、谷垣俊明、品田博之
    • Organizer
      日本化学会第101春季年会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 電子顕微鏡と情報科学的手法: 電子線ホログラフィーの展開2021

    • Author(s)
      村上恭和
    • Organizer
      日本学術振興会R026委員会第5回研究会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 電子顕微鏡のデータ収集・解析と情報科学的手法2021

    • Author(s)
      村上恭和、山本知一
    • Organizer
      日本顕微鏡学会、第3回顕微鏡計測インフォマティックス研究会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 電子線ホログラフィーによる磁場解析の高感度化~情報科学的手法の活用2020

    • Author(s)
      村上恭和、谷垣俊明、品田博之、御堂義博
    • Organizer
      日本磁気学会シンポジウム
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Application of Information Science to Electron Holography2019

    • Author(s)
      Yasukazu Murakami
    • Organizer
      Germany-Japan Joint Seminar on Advanced Electron Microscopy and Its Application
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 電子線ホログラフィーの高感度化と局所領域の電磁場解析2019

    • Author(s)
      村上恭和
    • Organizer
      応用物理学会 第3回極限ナノ造形・構造物性研究会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 情報科学技術を用いた電子線ホログラフィーの高感度化2019

    • Author(s)
      村上恭和
    • Organizer
      日本顕微鏡学会第62回シンポジウム
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 電子線ホログラフィーによるPt-TiO2界面の電位分布解析2019

    • Author(s)
      中島宏、山本真人、田中秀和、村上恭和
    • Organizer
      日本顕微鏡学会第75回学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Suppressing geometric phase shift in darkfield electron holography2019

    • Author(s)
      Cho Youngji、新津甲大、御堂義博、中前幸治、村上恭和
    • Organizer
      日本顕微鏡学会第75回学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 電子線ホログラフィーによるPt/TiO2界面電位分布の計測2019

    • Author(s)
      中島宏、山本真人、田中秀和、村上恭和
    • Organizer
      日本金属学会 2019年秋期講演大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 畳み込みニューラルネットワークを用いたRh触媒粒子の形態解析2019

    • Author(s)
      小山朗、浅利裕介、中島宏、佐藤敦子、寺田尚平、品田博之、佐藤勝俊、永岡勝俊、村上恭和
    • Organizer
      日本顕微鏡学会第75回学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 隠れマルコフモデルを用いた電子線ホログラムの雑音軽減2019

    • Author(s)
      玉岡武泰、村上恭和
    • Organizer
      日本顕微鏡学会 九州支部講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 電子顕微鏡に関わる話題提供 ~干渉実験と「場」の観察~2019

    • Author(s)
      村上恭和
    • Organizer
      日本学術振興会 水素機能解析技術第190委員会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 電子顕微鏡による電磁場解析の高感度化2019

    • Author(s)
      村上恭和
    • Organizer
      先端計測に学ぶ材料開発の指針
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Toward High-sensitivity Phase Measurement from Materials using Electron Holography2019

    • Author(s)
      Murakami Yasukazu
    • Organizer
      International Workshop of Ultra High-Resolution on Microscopy 2019
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 電子線ホログラフィーによる電磁場解析の高感度化2019

    • Author(s)
      村上恭和
    • Organizer
      日本鉄鋼協会/日本金属学会九州支部春期講演会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Electron holography studies on the grain boundary magnetism in Ga-doped Nd-Fe-B permanent magnet2018

    • Author(s)
      Murakami Yasukazu
    • Organizer
      The 12th Japan-Poland Joint Seminar on Micro and Nano Analysis
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Toward High-precision Off-axis Electron Holography: application of information science to microscopy2018

    • Author(s)
      Murakami Yasukazu
    • Organizer
      International Symposium on Microscopy and Microanalysis of Materials 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 電子線ホログラフィーを用いた材料界面の電磁場解析2018

    • Author(s)
      村上恭和
    • Organizer
      材料特性と顕微鏡観察技術の最近の動向
    • Related Report
      2018 Annual Research Report
    • Invited

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Published: 2018-04-23   Modified: 2023-01-30  

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