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Life-like dynamic group dynamics of self-propelled droplets

Research Project

Project/Area Number 17K05613
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Biological physics/Chemical physics/Soft matter physics
Research InstitutionHiroshima University

Principal Investigator

Tanaka Shinpei  広島大学, 総合科学研究科, 准教授 (40379897)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords自己駆動現象 / 自己組織化 / 動的集団挙動 / 自己駆動液滴集団 / 動的集団構造形成 / 反応拡散場 / アクティブマター / 生物的運動 / 集団運動 / 自己駆動 / 間欠運動 / 反応拡散 / 表面張力 / 自己駆動粒子 / 非平衡構造 / 人工生命
Outline of Final Research Achievements

A droplet of organic solvent floating on the surface of aqueous solution changes the surface tension around it. The droplet moves towards a region of stronger surface tension. This phenomenon is one of the self-propulsion because the force field is created by the droplet itself. When many droplets coexist, the surface tension field is affected by their motion and relative arrangements. Moreover, there are reactions between surface active molecules on the surface and the surfactant molecules dissolved in the bulk solution. These factors make the behaviors of droplets very complex and dynamic. We studied the complex behaviors of droplets both by experiments and by numerical simulations. We found that a model in which above mentioned factors, such as dynamic surface tension fields and reactions, are included could explain experimentally observed phenomena.

Academic Significance and Societal Importance of the Research Achievements

要素の自己駆動とそれによる集団の組織化は、生物界ではありふれた現象である。最近、非生物の要素であっても、同様の現象が見られることが注目されている。このような物質はアクティブマターと呼ばれ、自発的に蓄積したエネルギーを変換し運動するシステムとして、また自律的に運動できるシステムとして、様々な研究がなされている。本研究は、その中でも特に複雑で生物的な挙動を示す、水面に浮かんだ有機溶媒液滴システムに対して、その駆動メカニズムを実験とシミュレーションによって解明した。本研究の成果は、生物集団の集団形成メカニズムの研究や、自発的に組み上がって作動するロボットの開発などへの応用が期待される。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (15 results)

All 2019 2017 Other

All Int'l Joint Research (4 results) Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Int'l Joint Research] University of Trento(イタリア)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of Chem. and Tech.(チェコ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Univ. of Chemistry and Technology Prague/Helmholtz-Zentrum Dresden-Rossendorf/TU Dresden(チェコ)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Univ. of Chem. Tech. Prague(チェコ)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Free-energy model of phase inversion dynamics in binary phase separation2019

    • Author(s)
      Kubo Yoshihide、Tanaka Shinpei、Yamazaki Yoshihiro
    • Journal Title

      Physical Review E

      Volume: 100 Issue: 2 Pages: 022137-022137

    • DOI

      10.1103/physreve.100.022137

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dancing performance of organic droplets in aqueous surfactant solutions2019

    • Author(s)
      J. Cejkova, K. Schwarzenberger, K. Eckert, and S. Tanaka
    • Journal Title

      Collids Surf. A

      Volume: 566 Pages: 141-147

    • DOI

      10.1016/j.colsurfa.2019.01.027

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 水面を滑走する有機溶媒液滴の集団運動2017

    • Author(s)
      田中晋平
    • Journal Title

      C & I Commun.

      Volume: 42 Pages: 11-13

    • NAID

      40021626107

    • Related Report
      2017 Research-status Report
  • [Journal Article] Spontaneous emulsification and self-propulsion of oil droplets induced by the synthesis of amino acid-based surfactants2017

    • Author(s)
      Nagasaka Yuriko、Tanaka Shinpei、Nehira Tatsuo、Amimoto Tomoko
    • Journal Title

      Soft Matter

      Volume: 13 Issue: 37 Pages: 6450-6457

    • DOI

      10.1039/c7sm01117b

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Dynamic ordering in a swarm of floating droplets driven by solutal Marangoni effect2017

    • Author(s)
      Shinpei Tanaka, Satoshi Nakata and Takeshi Kano
    • Journal Title

      J. Phys. Soc. Jpn

      Volume: 86 Issue: 10 Pages: 101004-101004

    • DOI

      10.7566/jpsj.86.101004

    • NAID

      210000134520

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Self-inverted reciprocation of an oil droplet on a surfactant solution2017

    • Author(s)
      Yusuke Satoh, Yoshimi Sogabe, Katsuhiko Kayahara, Shinpei Tanaka, Masaharu Nagayama, and Satoshi Nakata
    • Journal Title

      Soft Matter

      Volume: 13 Issue: 18 Pages: 3422-3430

    • DOI

      10.1039/c7sm00252a

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Periodic collective behaviors of organic solvent droplets on the surface of aqueous surfactant solutions2019

    • Author(s)
      Shinpei Tanaka
    • Organizer
      The 2019 Conference on Artificial Life
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 粘弾性相分離における相反転パター ン形成の自由エネルギーモデル2019

    • Author(s)
      田中晋平
    • Organizer
      物理学会第74回年次大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Collective dynamic orderings of oil droplet surfers2017

    • Author(s)
      Shinpei Tanaka and Takeshi Kano
    • Organizer
      SWARM2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 界面でアミノ酸界面活性剤を合成するアル デヒド油滴の自己駆動現象2017

    • Author(s)
      長坂祐理子, 田中晋平
    • Organizer
      物理学会2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 気液界面を自己駆動する液滴集団の動的秩序 形成:非対称な相互作用モデルによる理解2017

    • Author(s)
      田中晋平, 加納剛史
    • Organizer
      物理学会第72回年次大会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2022-02-22  

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