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Opening the way to phase-interfacial nanofluidics using surface charge density mapping

Research Project

Project/Area Number 22K14193
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 19020:Thermal engineering-related
Research InstitutionKyushu University

Principal Investigator

Teshima Hideaki  九州大学, 工学研究院, 助教 (60906220)

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: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2022: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsケルビンプローブフォース顕微鏡 / 接触線 / 帯電 / 表面電荷密度 / 三相界線 / グラフェン / 相界面 / 固液界面 / KPFM
Outline of Research at the Start

固体-液体-気体の異なる三相が重なる三相界線の理解は今でも不十分なままで、特に三相界線を固定するピニング現象は未だ完全な理解には程遠い。
本研究では、架橋グラフェン液体セルという新しい実験用デバイスを開発することで、今まで不可能であったケルビンプローブフォース顕微鏡(KPFM)による固液界面および三相界線近傍の電荷密度マッピングの実現を目指す。これにより、実験的裏付けのある三相界線の新たなフォースバランスモデルの確立に向けた最初の一歩を踏み出す。

Outline of Final Research Achievements

To understand the physics at the solid-liquid-gas contact line, it is essential to consider the electric charge at the phase interfaces. This study aims to gain insights into nanoscale interfacial phenomena using Kelvin Probe Force Microscopy (KPFM) that can measure surface potential as a main technology. Our results showed that there exists an area extending approximately 100 microns that charges up to -1.0V near a droplet. It was indicated that a physical mechanism of the charging was different from a well-known solid-liquid contact charging. We have also made progress in developing a novel liquid cell that allows simultaneous KPFM measurements across solid-gas and solid-liquid interfaces. Besides, studies using TEM and AFM have provided numerous insights into the physics of flow phenomena inside nanomaterials and porous structures.

Academic Significance and Societal Importance of the Research Achievements

接触線近傍における特異な帯電を計測したのは世界初であり、接触線におけるフォースバランスといった熱・流体工学の長年の課題に新たな知見を提供するものである。また、水と固体面の相互作用から電力を直接抽出するブルーエネルギーの分野では接触線付近の固体面の帯電が特に重要であると予想されているが実測した例はなく、本研究結果が与えるインパクトは大きい。新規液体セルの構築が完了すればより定量的な知見を提供でき、その波及範囲は熱流体工学の垣根を越えてナノ流体工学・金属腐食工学・電気化学・界面科学など極めて広い。

Report

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

    (13 results)

All 2024 2023

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 5 results,  Invited: 2 results)

  • [Journal Article] Nano-captured water affects the wettability of cellulose nanofiber films2024

    • Author(s)
      Misaka Masumi、Teshima Hideaki、Hirokawa Sota、Li Qin-Yi、Takahashi Koji
    • Journal Title

      Surfaces and Interfaces

      Volume: 46 Pages: 103923-103923

    • DOI

      10.1016/j.surfin.2024.103923

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Crack expansion dynamics of freeze-dried soybean curd during rehydration2024

    • Author(s)
      Hirakawa Mai、Teshima Hideaki、Ikuta Tatsuya、Takahashi Koji
    • Journal Title

      Food Science and Technology Research

      Volume: 30 Issue: 3 Pages: 295-303

    • DOI

      10.3136/fstr.FSTR-D-23-00230

    • ISSN
      1344-6606, 1881-3984
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Optimizing the methodology for accurate and accessible slip length measurement with atomic force microscopy2024

    • Author(s)
      Ishida Haruya、Teshima Hideaki、Li Qin-Yi、Takahashi Koji
    • Journal Title

      International Journal of Thermofluids

      Volume: 22 Pages: 100634-100634

    • DOI

      10.1016/j.ijft.2024.100634

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nanoscale Contact Line Pinning Boosted by Angstrom-Scale Surface Heterogeneity2023

    • Author(s)
      Heima Yuta、Teshima Hideaki、Takahashi Koji
    • Journal Title

      The Journal of Physical Chemistry Letters

      Volume: 14 Issue: 14 Pages: 3561-3566

    • DOI

      10.1021/acs.jpclett.3c00428

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] Crack Propagation Mechanism of Freeze-Dried Soybean Curds during the Rehydration Process2023

    • Author(s)
      Mai Hirakawa、Hideaki Teshima、Tatsuya Ikuta、Koji Takahashi
    • Organizer
      76th Annual Meeting of the American Physical Society Division of Fluid Dynamics
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of AFM Measurement Method for Slip Length Considering the Effect of Electric Double Layer Force2023

    • Author(s)
      Haruya Ishida、Hideaki Teshima、Koji Takahashi
    • Organizer
      Micro and Nano Flows Conference 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Thermally Induced Nucleation, Growth, and Dissolution of Surface Nanobubbles2023

    • Author(s)
      Hideaki Teshima、Qin-Yi Li、Koji Takahashi
    • Organizer
      Micro and Nano Flows Conference 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental Investigation of Solid-Liquid Interfacial Phenomena at the Nanoscale2023

    • Author(s)
      Hideaki Teshima
    • Organizer
      10th US-Japan Joint Seminar on Nanoscale Transport Phenomena
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Experimental Investigation of Solid-Liquid-Gas Interfacial Phenomena at the Nanoscale2023

    • Author(s)
      Hideaki Teshima
    • Organizer
      2024 I2CNER Annual Symposium Thrust Workshop ~Advanced Energy Materials Thrust & Multiscale Science and Engineering for Energy and the Environment Thrust~
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] AFMを用いた固液界面のナノスケール気相計測とその信頼性2023

    • Author(s)
      手嶋秀彰、高橋厚史
    • Organizer
      日本顕微鏡学会第79回学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 温度変化に誘起される界面ナノバブルとマイクロパンケーキのダイナミク2023

    • Author(s)
      手嶋秀彰、高橋厚史
    • Organizer
      日本混相流学会 混相流シンポジウム2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] 界面ナノバブルの安定性と内圧に関する実験的研究2023

    • Author(s)
      手嶋秀彰、永野箇実、高橋厚史
    • Organizer
      日本機械学会 熱工学コンファレンス2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] ケルビンプローブフォース顕微鏡法を用いた固気液三相接触線近傍の帯電現象に関する研究2023

    • Author(s)
      石原佑樹、手嶋秀彰、高橋厚史
    • Organizer
      日本機械学会 第14回マイクロ・ナノ工学シンポジウム
    • Related Report
      2023 Annual Research Report

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

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