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Local hydration measured by 3D scanning AFM and elucidation of the mechanism of enhancement and suppression of hydrophobic interactions

Research Project

Project/Area Number 20H02689
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 32010:Fundamental physical chemistry-related
Research InstitutionKanazawa University

Principal Investigator

Asakawa Hitoshi  金沢大学, 物質化学系, 准教授 (90509605)

Co-Investigator(Kenkyū-buntansha) 生越 友樹  京都大学, 工学研究科, 教授 (00447682)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2023: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2022: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2021: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2020: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Keywords原子間力顕微鏡 / 疎水性相互作用 / 水和構造 / 局所水和構造
Outline of Research at the Start

疎水性相互作用は分子間に働く相互作用のひとつである。水中で働く特殊な相互作用であり、疎水性分子構造の周囲に形成された水分子のネットワーク構造が重要であると理解されている。しかし、その水分子ネットワーク構造を直接観察することがあらゆる計測手法を用いても難しいため、その理解は十分ではない。そこで本研究では原子レベルで先鋭化された探針を用いて局所構造を観察する原子間力顕微鏡と呼ばれる計測方法を用いて疎水性構造の周囲に存在する水分子ネットワーク構造を可視化することを目指す。得られた構造情報から疎水性相互作用を理解し、新規材料開発へ発展させる。

Outline of Final Research Achievements

Using 3D scanning AFM technique, the hydrophobic planar model of hydrophobic structure with varying densities of immobilised ions can be visualized, revealing the influence of hydrophobic structure and ion density/ion configuration on the hydration structure. Furthermore, as a hydrophobic space model, the self-assembled structure of tetrapod-type molecules and the characteristic attraction distribution originated from the water density in the nanospace of cyclic molecules can be discussed quantitatively. The hydrophobic structure and the surrounding hydration structure can be visualised at the single-molecule level, advancing our understanding of the mechanisms of enhancement and suppression of hydrophobic interactions.

Academic Significance and Societal Importance of the Research Achievements

疎水性相互作用は化学・材料・生物・医療などざまざまな分子システムにおいて重要な相互作用であると考えられており、その分子スケールメカニズムの理解は極めて重要である。本研究の推進により進展した疎水性相互作用と局所水和構造の関係性を理解することはこれらの基礎研究・産業応用のあらゆる分野にも貢献する成果であり、学術的・社会的な両面で意義があると考えられる。3D-AFM手法で得られる微視的理解は実際の材料・分子システムの性能向上に向けた精密分子設計に貢献できる。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (16 results)

All 2024 2023 2022 2021 2020

All Journal Article (9 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 9 results,  Open Access: 3 results) Presentation (7 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results)

  • [Journal Article] Silica nanoparticle-membrane interactions investigated by atomic force microscopy in an organic solvent2024

    • Author(s)
      Morimoto Masayuki、Fujimura Yu、Kawakatsu Takahiro、Kida Naoki、Asakawa Hitoshi
    • Journal Title

      Colloids and Surfaces A: Physicochemical and Engineering Aspects

      Volume: 683 Pages: 132858-132858

    • DOI

      10.1016/j.colsurfa.2023.132858

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] CO2 reduction by visible-light-induced photoemission from heavily N-doped diamond nano-layer2024

    • Author(s)
      Yoshikawa Taro、Asakawa Hitoshi、Matsumoto Tsubasa、Ichikawa Kimiyoshi、Kaga Akira、Yamamoto Shintaro、Izumi Ryosuke、Ohno Mitsuru、Mahiko Tomoaki、Mutsuda Mitsuteru、Yamasaki Satoshi、Tokuda Norio
    • Journal Title

      Carbon

      Volume: 218 Pages: 118689-118689

    • DOI

      10.1016/j.carbon.2023.118689

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Growth mechanisms and anisotropic softness?dependent conductivity of orientation-controllable metal?organic framework nanofilms2023

    • Author(s)
      Yao Ming-Shui、Otake Ken-ichi、Koganezawa Tomoyuki、Ogasawara Moe、Asakawa Hitoshi、Tsujimoto Masahiko、Xue Zi-Qian、Li Yan-Hong、Flanders Nathan C.、Wang Ping、Gu Yi-Fan、Honma Tetsuo、Kawaguchi Shogo、Kubota Yoshiki、Kitagawa Susumu
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 120 Issue: 40

    • DOI

      10.1073/pnas.2305125120

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Atomic force microscopic analysis of the light-harvesting complex 2 from purple photosynthetic bacterium Thermochromatium tepidum2023

    • Author(s)
      Morimoto Masayuki、Hirao Haruna、Kondo Masaharu、Dewa Takehisa、Kimura Yukihiro、Wang-Otomo Zheng-Yu、Asakawa Hitoshi、Saga Yoshitaka
    • Journal Title

      Photosynthesis Research

      Volume: - Issue: 1 Pages: 1-1

    • DOI

      10.1007/s11120-023-01010-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Determination of the critical chain length for macromolecular crystallization using structurally flexible polyketones2022

    • Author(s)
      Ide Yuki、Manabe Yumehiro、Inaba Yuya、Kinoshita Yusuke、Pirillo Jenny、Hijikata Yuh、Yoneda Tomoki、Shivakumar Kilingaru I.、Tanaka Saki、Asakawa Hitoshi、Inokuma Yasuhide
    • Journal Title

      Chemical Science

      Volume: 13 Issue: 34 Pages: 9848-9854

    • DOI

      10.1039/d2sc03083g

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] State- and water repellency-controllable molecular glass of pillar[5]arenes with fluoroalkyl groups by guest vapors2022

    • Author(s)
      Onishi Katsuto、Ohtani Shunsuke、Kato Kenichi、Fa Shixin、Sakata Yoko、Akine Shigehisa、Ogasawara Moe、Asakawa Hitoshi、Nagano Shusaku、Takashima Yoshinori、Mizuno Motohiro、Ogoshi Tomoki
    • Journal Title

      Chemical Science

      Volume: 13 Issue: 14 Pages: 4082-4087

    • DOI

      10.1039/d2sc00828a

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Local Cross-Coupling Activity of Azide-Hexa(ethylene glycol)-Terminated Self-Assembled Monolayers Investigated by Atomic Force Microscopy2021

    • Author(s)
      Lebitania Julie Ann、Inada Natsumi、Morimoto Masayuki、You Jiaxun、Shahiduzzaman Md.、Taima Tetsuya、Hirata Kaito、Fukuma Takeshi、Ohta Akio、Asakawa Tsuyoshi、Asakawa Hitoshi
    • Journal Title

      Langmuir

      Volume: 37 Issue: 50 Pages: 14688-14696

    • DOI

      10.1021/acs.langmuir.1c02451

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Understanding the Polymerization of Diphenylacetylenes with Tantalum(V) Chloride and Cocatalysts: Production of Cyclic Poly(diphenylacetylene)s by Low-Valent Tantalum Species Generated in Situ2021

    • Author(s)
      Sueyoshi Shingyo、Taniguchi Tsuyoshi、Tanaka Saki、Asakawa Hitoshi、Nishimura Tatsuya、Maeda Katsuhiro
    • Journal Title

      Journal of the American Chemical Society

      Volume: 143 Issue: 39 Pages: 16136-16146

    • DOI

      10.1021/jacs.1c06811

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Photo-sensitive 2D Arrangement of ?OH/H2O on Brookite TiO2(210)2020

    • Author(s)
      Yang Lei、Igarashi Takumi、Cao Yu、Holmstr?m Eero、Hirata Kaito、Asakawa Hitoshi、Ohno Teruhisa、Fukuma Takeshi、Foster Adam S.
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 124 Issue: 35 Pages: 19091-19100

    • DOI

      10.1021/acs.jpcc.0c05151

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Subnanometer-Scale Visualization of Interaction Forces atSelf-Assembled Molecules/Water Interfaces with 3D-AFM2023

    • Author(s)
      Moe Ogasawara, Masayuki Morimoto, Hitoshi Asakawa
    • Organizer
      2023 MRS Spring Meeting & Exhibit
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Spatial distribution of interaction forces in hydrophobic nanopockets visualized by three-dimensional scanning AFM2023

    • Author(s)
      Moe Ogasawara, Masayuki Morimoto, Hitoshi Asakawa
    • Organizer
      EM-NANO2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] モデル分子認識ポケットに存在する相互作用力分布の液中3D-AFM 計測2023

    • Author(s)
      小笠原 萌、森本 将行、淺川 雅
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 低揮発性有機溶媒中のサブナノメートル分解能FM-AFM計測2023

    • Author(s)
      木田 直樹、森本 将行、淺川 雅
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Subnanometer-Scale Mobile Structures Localized at an Interface Between One- Dimensionally Aligned Sulfonate Groups and Water Investigated by Three-Dimensional Scanning AFM2023

    • Author(s)
      Masayuki Morimoto, Hitoshi Asakawa
    • Organizer
      2023 MRS Fall Meeting & Exhibit
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 液中周波数変調AFMを用いた超分子会合体の分布・動態解析2021

    • Author(s)
      淺川雅
    • Organizer
      NANOSPEC 2021
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 原子間力顕微鏡による固液界面現象の原子・分子スケールその場観察2020

    • Author(s)
      淺川 雅
    • Organizer
      日本分析化学会中部支部北陸地区講演会
    • Related Report
      2020 Annual Research Report
    • Invited

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Published: 2020-04-28   Modified: 2025-01-30  

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