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Advancing In-liquid AFM for Nanoscale Measurement of Potential Distribution at Biomolecular Surfaces and Interfaces

Research Project

Project/Area Number 22K14602
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 29020:Thin film/surface and interfacial physical properties-related
Research InstitutionNagoya University (2023)
Kanazawa University (2022)

Principal Investigator

Hirata Kaito  名古屋大学, 工学研究科, 特任助教 (50909984)

Project Period (FY) 2022-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords原子間力顕微鏡 / 液中電位計測 / 生体分子 / 脂質二重層膜 / オープンループ電位顕微鏡 / 液中電位分布計測 / 表面電位 / 電気二重層
Outline of Research at the Start

生体分子機能のナノレベルの機序には「表面電荷・液中電荷」が関係する現象が多数存在する。本研究は、我々が独自開発してきたAFMベースの液中電位計測技術であるOL-EPMを生体分子計測へと応用するため、生体膜の基本構造である脂質二重層膜の電位計測を行い、電位の探針依存性や電位距離依存性の検証により、生体分子計測時の電位可視化メカニズムを明らかにすることが目的である。
本研究達成は、生体分子/溶液界面における電位分布が生体分子機能に関係する現象のナノレベルでの機序解明に貢献すると考える。それらは、創薬・医学の学術的な理解に必要であり、可能になれば、生命科学分野の発展に繋がることが期待される。

Outline of Final Research Achievements

In this study, we established a method to apply open-loop electric potential microscopy(OL-EPM), which is enable to measure local surface potential in liquid, to biomolecular measurements for the first time. Specifically, we developed the conducitve substrate for the potential measurement and the cantilever, which serves as the detector for OL-EPM. These components were applied to a supported lipid bilayer with positively and negatively charged heads. The results showed a potential distribution reflecting the head charges, indicating that this technique has the ability to measure the potential distribution of biomolecules. In the future, the foundational technology developed in this study can serve as a basis for the potential measurement of various biomolecules.

Academic Significance and Societal Importance of the Research Achievements

近年では生命現象への原子間力顕微鏡(AFM)の進展が目覚ましい。しかし、表面電荷・電位を局所計測できる技術は確立されておらず、生体分子機能において液中イオンや生体分子の表面電荷が関係する現象の理解が進んでいない。本研究で確立してきた基盤技術により生体分子の「電荷・電位」計測を可能にすることで、従来技術では困難であったイオンチャネルによるイオン輸送や膜分解ペプチドの静電的相互作用による脂質分子の吸着・脱離など、生体分子/溶液界面の電位分布が関係するとされる生体分子機能のナノレベルでの機序解明に貢献する。それらは、創薬・医学の学術的な理解に必要であり、生命科学分野の発展に繋がることが期待される。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (17 results)

All 2024 2023 2022 Other

All Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 3 results) Remarks (2 results)

  • [Journal Article] Dynamics of Molecular Self‐Assembly of Short Peptides at Liquid-Solid Interfaces-Effect of Charged Amino Acid Point Mutations2024

    • Author(s)
      Yurtsever Ayhan、Hirata Kaito、Kojima Ryohei、Miyazawa Keisuke、Miyata Kazuki、Kesornsit Sanhanut、Zareie Hadi、Sun Linhao、Maeda Katsuhiro、Sarikaya Mehmet、Fukuma Takeshi
    • Journal Title

      Small

      Volume: 20 Issue: 25 Pages: 2400653-2400653

    • DOI

      10.1002/smll.202400653

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Size‐Dependent Corrosion of Al‐Fe Intermetallic Particles at Al‐Mg Alloy Surfaces Investigated by In‐Liquid Nanoscale Potential Measurement Technique2023

    • Author(s)
      Hirata Kaito、Okamoto Takahiro、Kitagawa Takuya、Tomitori Masahiko、Ozawa Takahiro、Fukuma Takeshi
    • Journal Title

      Small

      Volume: 19 Issue: 50 Pages: 2207859-2207859

    • DOI

      10.1002/smll.202207859

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Biophysical Properties of the Fibril Structure of the Toxic Conformer of Amyloid-β42: Characterization by Atomic Force Microscopy in Liquid and Molecular Docking2023

    • Author(s)
      Biyani Radhika、Hirata Kaito、Oqmhula Kenji、Yurtsever Ayhan、Hongo Kenta、Maezono Ryo、Takagi Masahiro、Fukuma Takeshi、Biyani Manish
    • Journal Title

      ACS Appl. Mater. Interfaces

      Volume: 15 Issue: 23 Pages: 27789-27800

    • DOI

      10.1021/acsami.3c06460

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Molecular Scale Structure and Kinetics of Layer-by-Layer Peptide Self-Organization at Atomically Flat Solid Surfaces2023

    • Author(s)
      Yurtsever Ayhan、Sun Linhao、Hirata Kaito、Fukuma Takeshi、Rath Siddharth、Zareie Hadi、Watanabe Shinji、Sarikaya Mehmet
    • Journal Title

      ACS Nano

      Volume: 17 Issue: 8 Pages: 7311-7325

    • DOI

      10.1021/acsnano.2c10673

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Nanoscale Corrosion Mechanism at Grain Boundaries of the Al-Zn-Mg Alloy Investigated by Open-Loop Electric Potential Microscopy2023

    • Author(s)
      Yamamoto Shinnosuke、Taniguchi Daiki、Okamoto Takahiro、Hirata Kaito、Ozawa Takahiro、Fukuma Takeshi
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 127 Issue: 11 Pages: 5281-5288

    • DOI

      10.1021/acs.jpcc.2c08322

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] Experiments and FEM simulations of surface potential measurements of lipid bilayers by open-loop electric potential microscopy in liquid2023

    • Author(s)
      D. Hamasaki, K. Hirata, A. Sumino, S. Yamamoto, T. Fukuma
    • Organizer
      31st International Colloquium on Scanning Probe Microscopy (ICSPM31)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Corrosion Mechanism of Aluminum Alloy Investigated by in-Liquid Nanoscale Potential Measurement Technique2023

    • Author(s)
      S. Yamamoto, K. Hirata, D. Taniguchi, T. Okamoto, T. Kitagawa, T. Ozawa, T. Fukuma
    • Organizer
      9th Multifrequency AFM conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ナノスケール液中電位分布計測技術を用いたアルミニウム合金材料の粒界腐食機構の解明2023

    • Author(s)
      山本伸之介,谷口大騎,岡本貴浩,平田海斗,小澤敬祐,福間剛士
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 液中局所電位分布計測技術を用いたAl合金表面におけるナノスケール腐食機構解析2023

    • Author(s)
      小西沙和、山本伸之介、平田海斗、福間剛士
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] オープンループ電位顕微鏡によるイオン液体/金電極界面におけるサブナノメートルスケール電荷分布の可視化2023

    • Author(s)
      五十嵐 陽彦、炭竃 享司、平田 海斗、宮田 一輝、宮澤 佳甫, 清水 直, 岩佐 義宏, 福間 剛士
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 液中オープンループ電位顕微鏡を用いた正電荷脂質二重層の表面電位計測2022

    • Author(s)
      濱崎 大暉, 平田 海斗, 角野 歩, 山本 伸之介, 福間 剛士
    • Organizer
      春季応用物理学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 液中局所電位分布計測技術を用いたTi合金表面におけるナノスケールカソード反応解析2022

    • Author(s)
      小西沙和、近江純一、谷口大騎、山本伸之介、平田海斗、水島大地、伊藤元雄、福間剛士
    • Organizer
      応用物理学会秋季学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] 液中電位分布計測技術を用いた炭素鋼のナノスケールその場解析2022

    • Author(s)
      山本伸之介,水島大地,平田海斗, 福間剛士
    • Organizer
      第69回材料と環境討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] 液中局所電位分布計測技術を用いたTi合金表面におけるナノスケールカソード反応解析2022

    • Author(s)
      小西沙和、近江純一、谷口大騎、山本伸之介、平田海斗、 水島大地、伊藤元雄、福間剛士
    • Organizer
      第69回材料と環境討論会、久留米シティプラザ
    • Related Report
      2022 Research-status Report
  • [Presentation] Corrosion Mechanism of Aluminum Alloy at Grain Boundaries Investigated by in-Liquid Nanoscale Potential Measurement Technique2022

    • Author(s)
      S.Yamamoto, D. Taniguchi, K. Hirata, T. Ozawa, T. Fukuma
    • Organizer
      AVS 68th INTERNATIONA SYMPOSIUM & EXHIBITION,
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Remarks] 福間研究室

    • URL

      https://fukuma.w3.kanazawa-u.ac.jp/NewHP/index/index.html

    • Related Report
      2023 Annual Research Report
  • [Remarks] 金沢大学福間研究室ホームページ

    • URL

      http://fukuma.w3.kanazawa-u.ac.jp/

    • Related Report
      2022 Research-status Report

URL: 

Published: 2022-04-19   Modified: 2025-01-30  

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