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Exploring deeply supercooled liquid droplets in a vacuum

Research Project

Project/Area Number 21K18604
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 13:Condensed matter physics and related fields
Research InstitutionKyushu University

Principal Investigator

TERASAKI Akira  九州大学, 理学研究院, 教授 (60222147)

Co-Investigator(Kenkyū-buntansha) 秋山 良  九州大学, 理学研究院, 准教授 (60363347)
堀尾 琢哉  九州大学, 理学研究院, 准教授 (40443022)
荒川 雅  九州大学, 理学研究院, 助教 (10610264)
Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2021: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywords過冷却液体 / 液滴 / 真空 / 蒸発冷却 / 相転移
Outline of Research at the Start

本研究は、真空中の液滴を扱う我々独自の実験手段で、従来困難だった過冷却深部の未踏領域の探索に挑戦する。例えば4℃での密度最大など、水の謎の解明は、物質科学から生命科学にまで波及する重要な課題である。この謎の主要因の一つが過冷却液体の科学の空白地帯にあることから、本手法で可能となる低温領域への新たなアプローチで、過冷却状態の高密度水-低密度水間の相転移など、水の相図問題に挑む。なお、この問題に取り組む戦略として、ポリオール混合溶液、塩添加溶液など水溶液系も対象とし、基本的な諸物性を明らかにする。これらの研究を通して、過冷却液体の科学の深化を図る。

Outline of Final Research Achievements

We have explored deeply supercooled liquids of water and its dilute polyol solution by means of experiments based on liquid droplets in a vacuum along with theoretical approaches by molecular-dynamics simulation. Several properties of supercooled water were elucidated, including surface tension, viscosity, evaporation rates, homogeneous ice nucleation rates. Effects of polyol addition to the water were analyzed by focusing on delay in the freezing time as well as change in the hydration state. These achievements are expected to contribute to future development of science of matters in extreme environments.

Academic Significance and Societal Importance of the Research Achievements

過冷却液体の研究は、極限環境を扱う実験上の困難で停滞していたが、真空中の液滴を自在に発生・操作・制御する独自の実験技術を駆使し、純水および水溶液系の過冷却深部における物性解明を進めた点で、学術的意義が高い。研究協力者の学生が表彰されるなど、全国規模の学会で研究成果が高い評価を得たことも特筆に値する。さらに、成果の波及は物質科学に止まらず、特に水の謎の解明は生命科学にまで波及する点、また博士号取得者の輩出など若手研究者の育成の面でも成果を上げた点で、社会的意義も大きい。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (21 results)

All 2024 2023 2022 2021 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (17 results) (of which Int'l Joint Research: 6 results,  Invited: 4 results) Remarks (1 results)

  • [Journal Article] Two-dimensional ordering of bacteriorhodopsins in a lipid bilayer and effects caused by repulsive core between lipid molecules on lateral depletion interaction: A study based on a thermodynamic perturbation theory2023

    • Author(s)
      Keiju Suda, Ayumi Suematsu, and Ryo Akiyama
    • Journal Title

      Physica A

      Volume: 630 Pages: 129260-129260

    • DOI

      10.1016/j.physa.2023.129260

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Integral equation study of effective attraction between like-charged particles mediated by cations: Comparison between IPY2 and HNC closures2022

    • Author(s)
      Takeda M.、Maruyama K.、Akiyama R.、Miyata T.
    • Journal Title

      Europhysics Letters

      Volume: 140 Issue: 1 Pages: 17001-17001

    • DOI

      10.1209/0295-5075/ac94f5

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Usefulness of higher-order system-size correction for macromolecule diffusion coefficients: A molecular dynamics study2022

    • Author(s)
      Iwashita Tomoya、Nagao Masaaki、Yoshimori Akira、Terazima Masahide、Akiyama Ryo
    • Journal Title

      Chemical Physics Letters

      Volume: 807 Pages: 140096-140096

    • DOI

      10.1016/j.cplett.2022.140096

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] 真空中のポリオール添加水液滴の凍結過程:凍結時間の観測と分子動力学シミュレーションによる解析2024

    • Author(s)
      吉岡拓哉、荒川 雅、秋山 良、寺嵜 亨
    • Organizer
      日本化学会第104春季年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 真空中の蒸発冷却による水液滴の均質凍結:液滴径変化の光測定と相転移挙動の高速画像観察2024

    • Author(s)
      飯田岳史、堀尾琢哉、荒川 雅、寺嵜 亨
    • Organizer
      日本化学会第104春季年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 教科書では学ばない実効力利用の話:エントロピー駆動の“引力”と同符号電荷間の“引力”2024

    • Author(s)
      秋山 良
    • Organizer
      新潟工学振興会 技術講演会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] A theoretical approach for separation device based on the idea of entropic attraction2024

    • Author(s)
      R. Akiyama
    • Organizer
      KIAS-FUB International Workshop on Bio-Soft Matter Theory
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Molecular dynamics study of difference of friction coefficients between hydrophilic and hydrophobic surfaces on a macromolecule in water2024

    • Author(s)
      T. Iwashita and R. Akiyama
    • Organizer
      KIAS-FUB International Workshop on Bio-Soft Matter Theory
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Reentrant behavior in effectve interactons between like-charged macroions immersed in an electrolyte soluton2024

    • Author(s)
      R. Akiyama
    • Organizer
      KIAS-FUB International Workshop on Bio-Soft Matter Theory
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Co-cation effect on the reentrant behavior of effective interaction between like-charged particles immersed in an electrolyte solution2023

    • Author(s)
      R. Akiyama
    • Organizer
      5th ICMARI2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 電解質溶液中の同符号電荷間の実効引力2023

    • Author(s)
      秋山 良
    • Organizer
      令和5年度 物理化学インターカレッジセミナー 兼 日本油化学会界面科学部会九州地区講演会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 電解質溶液中の同符号電荷間相互作用が示すリエントラント挙動とその普遍性2023

    • Author(s)
      秋山 良、末松安由美、竹田宙加、宮田竜彦、丸山虎哲
    • Organizer
      第45回溶液化学シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] The Decomposition of Friction Coefficients for Analysis of Solvation Effects on Diffusion Coefficients2023

    • Author(s)
      T. Iwashita and R. Akiyama
    • Organizer
      The 5th conference of Theory and Applications of Computational Chemistry (TACC2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Molecular dynamics study of difference of friction coefficients between hydrophilic and hydrophobic surfaces on a macromolecule in water2023

    • Author(s)
      K. Tokunaga, Y. Nakamura, R. Akiyama, and A. Yoshimori
    • Organizer
      STATPHYS28
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 真空下の蒸発冷却過程の解明を目指した水滴径の精密測定法2023

    • Author(s)
      飯田岳史、吉岡拓哉、荒川 雅、堀尾琢哉、寺嵜 亨
    • Organizer
      ナノ学会第21回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 真空下における水液滴の蒸発冷却過程:ラマン散乱共鳴波長による液滴直径測定と凍結過程の画像解析2022

    • Author(s)
      飯田岳史、吉岡拓哉、楠本多聞、荒川 雅、堀尾琢哉、寺嵜 亨
    • Organizer
      ナノ学会第20回大会
    • Related Report
      2022 Research-status Report
  • [Presentation] ポリオール化合物を添加した真空中の水液滴の凍結過程2022

    • Author(s)
      吉岡拓哉、飯田岳史、楠本多聞、荒川 雅、堀尾琢哉、寺嵜 亨
    • Organizer
      The 15th Mini-Symposium on Liquids
    • Related Report
      2022 Research-status Report
  • [Presentation] 真空下における水滴の蒸発冷却過程:Whispering Gallery Modeの波長測定による液滴直径計測2022

    • Author(s)
      飯田岳史、荒川 雅、堀尾琢哉、寺嵜 亨
    • Organizer
      第16回分子科学討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] ポリオール添加による真空中の水液滴の凍結遅延2022

    • Author(s)
      吉岡拓哉、飯田岳史、荒川 雅、堀尾琢哉、寺嵜 亨
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] エチレングリコール添加による真空中の水液滴の凍結時間遅延2021

    • Author(s)
      吉岡拓哉、飯田岳史、楠本多聞、荒川 雅、堀尾琢哉、寺嵜 亨
    • Organizer
      第15回分子科学討論会
    • Related Report
      2021 Research-status Report
  • [Remarks] 九州大学大学院理学研究院化学部門量子化学研究室ホームページ

    • URL

      http://www.scc.kyushu-u.ac.jp/quantum/index_j.php

    • Related Report
      2023 Annual Research Report 2022 Research-status Report 2021 Research-status Report

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Published: 2021-07-13   Modified: 2025-01-30  

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