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Collective behavior and hysteresis on organic active matter

Research Project

Project/Area Number 16H04032
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Biological physics/Chemical physics/Soft matter physics
Research InstitutionThe University of Tokyo

Principal Investigator

TOYOTA TARO  東京大学, 大学院総合文化研究科, 准教授 (80422377)

Co-Investigator(Kenkyū-buntansha) 本多 智  東京大学, 大学院総合文化研究科, 助教 (10711715)
Research Collaborator BANNO Taisuke  
KITAHATA Hiroyuki  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2018: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2017: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2016: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
Keywords駆動現象 / 自己組織化 / 協同現象 / エマルション / 界面張力 / 界面活性剤 / ポリジメチルシロキサン / 履歴現象 / 自己駆動 / 集団現象 / 履歴 / 両親媒性分子 / 油滴 / マイクロ・ナノデバイス / 群れ
Outline of Final Research Achievements

We have aimed at clarifying the mechanism of self-propelled motion of soft matter prticles (such as oil droplets) in/on aqueous surfactant solution, the hysterisis effect resulting from inner molecular self-organisation of the particles, and their collective behaviors. By developing new amphiphilic molecules, improving device manufacturing, or establishing an observation methods, we found that the self-propelled motion of oil droplets is primarily governed by the heterogeniety of the interfacial tension around the oil droplet, and their motion modes are varied by molecular affinity of the components or constraint conditions. We also developed a new fuctionalized polydimethylsiloxane which changes liquidity upon ON/OFF of UV irradiation repeatedly.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は,界面活性剤水溶液で駆動する油滴のドライビングフォースを明確にするだけでなく,構成分子の親和性や環境による拘束条件に基づいて油滴が運動モードを多様化することを新たに見出したものである。比較的単純な分子構造の油や界面活性剤などを用いた本実験結果は,生命が誕生する以前の原始的な細胞のモデルでも単純な駆動機構をもちえたことを意味しており,従来の物理学や化学の枠を超えて意義深いものと言える。また,紫外光照射で繰り返し流動化できるポリジメチルシロキサンは,任意のタイミングとサイトで変形誘導が可能であり,造形材料や接着剤など新しい活用法へつながることから,産業的価値が高い点で社会的意義がある。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (17 results)

All 2019 2018 2017 Other

All Journal Article (8 results) (of which Peer Reviewed: 8 results,  Open Access: 2 results) Presentation (7 results) (of which Int'l Joint Research: 3 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Construction of a chemical motor-movable frame assembly based on camphor grains using water-floating 3D-printed models2019

    • Author(s)
      Hiroaki Morohashi, Masayuki Imai, Taro Toyota
    • Journal Title

      Chemical Physics Letters

      Volume: 721 Pages: 104-110

    • DOI

      10.1016/j.cplett.2019.02.034

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Topology-Reset Execution: Repeatable Post-Cyclization Re-cyclization of Cyclic Polymers2019

    • Author(s)
      Satoshi Honda, Minami Oka, Hideaki Takagi, Taro Toyota
    • Journal Title

      Angewandte Chemie International Edition

      Volume: 58 Issue: 1 Pages: 144-148

    • DOI

      10.1002/ange.201809621

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Motion modes of two self-propelled camphor boats on the surface of a surfactant-containing solution2018

    • Author(s)
      Yuichiro Karasawa, Tomonori Nomoto, Luca Chiari, Taro Toyota, Masanori Fujinami
    • Journal Title

      Journal of Colloid and Interface Science

      Volume: 511 Pages: 184-192

    • DOI

      10.1016/j.jcis.2017.09.099

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photocontrolled network formation and dissociation with coumarin end-functionalized branched poly(dimethyl siloxane)s2018

    • Author(s)
      Honda Satoshi、Toyota Taro
    • Journal Title

      Polymer

      Volume: 148 Pages: 211-216

    • DOI

      10.1016/j.polymer.2018.06.034

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Experimental Investigation of the Self-Propelled Motion of a Sodium Oleate Tablet and Boat at an Oil-Water Interface2018

    • Author(s)
      Yasuto Watahiki, Tomonori Nomoto, Luca Chiari, Taro Toyota, Masanori Fujinami
    • Journal Title

      Langmuir

      Volume: 34 Issue: 19 Pages: 5487-5494

    • DOI

      10.1021/acs.langmuir.8b01090

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Locomotion Mode of Micrometer-Sized Oil Droplets in Solutions of Cationic Surfactants Having Ester or Ether Linkages2018

    • Author(s)
      Hirono Ayana、Toyota Taro、Asakura Kouichi、Banno Taisuke
    • Journal Title

      Langmuir

      Volume: 34 Issue: 26 Pages: 7821-7826

    • DOI

      10.1021/acs.langmuir.8b01352

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photo-triggered solvent-free metamorphosis of polymeric materials2017

    • Author(s)
      S. Honda, T. Toyota
    • Journal Title

      Nature Communications

      Volume: 8 Issue: 1 Pages: 502-502

    • DOI

      10.1038/s41467-017-00679-1

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Self-propelled motion of monodisperse underwater oil droplets formed by a microfluidic device2017

    • Author(s)
      Naoko Ueno, Taisuke Banno, Arisa Asami, Yuki Kazayama, Yuya Morimoto, Toshihisa Osaki, Shoji Takeuchi, Hiroyuki Kitahata, and *Taro Toyota
    • Journal Title

      Langmuir

      Volume: 33 Issue: 22 Pages: 5393-5397

    • DOI

      10.1021/acs.langmuir.7b00092

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Presentation] Cell-Mimicry Behaviors of Micrometer-Sized Oil Droplets in Aqueous Solution2018

    • Author(s)
      Taisuke Banno, Taro Toyota, Kouichi Asakura
    • Organizer
      Alife 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Synthesis of photoresponsive network poly(dimethyl siloxane)s from three- and four-armed star-shaped precursors for the tuning of viscoelasticity2018

    • Author(s)
      Minami Oka, Satoshi Honda, Taro Toyota
    • Organizer
      MACRO18 World Polymer Congress
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Synthesis of well-defined linear and star-shaped poly(dimethyl siloxane)s toward solvent-free isothermal tuning of rheological properties2018

    • Author(s)
      Satoshi Honda, Taro Toyota
    • Organizer
      MACRO18 World Polymer Congress
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 主鎖結合様式の星型-網目高分子間変換に立脚したポリジメチルシロキサンの光誘起液状化・固化2017

    • Author(s)
      本多 智, 田中信明, 豊田太郎
    • Organizer
      第66回高分子学会年次大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 固化・液状化の光制御を目指した四分岐星型および網目高分子間分子形状変換2017

    • Author(s)
      田中信明, 本多 智, 豊田太郎
    • Organizer
      第66回高分子学会年次大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Isothermal reversible softening and hardening of polymer gels and networks based on a photo-triggered repeatable macromolecular architectural transformations2017

    • Author(s)
      Satoshi Honda, Taro Toyota
    • Organizer
      254th ACS National Meeting & Exposition
    • Related Report
      2017 Annual Research Report
  • [Presentation] 星型-網目間の高分子形状変換に伴うポリジメチルシロキサンの流動・非流動機構2017

    • Author(s)
      本多智, 高木秀彰, 豊田太郎
    • Organizer
      第66回高分子討論会
    • Related Report
      2017 Annual Research Report
  • [Book] Self-organized Motion: Physicochemical Design based on Nonlinear Dynamics2018

    • Author(s)
      Taro Toyota, Taisuke Banno, Koichi Asakura
    • Total Pages
      371
    • Publisher
      RSC Publishing
    • Related Report
      2018 Annual Research Report
  • [Remarks] 豊田研究室ホームページ

    • URL

      http://park.itc.u-tokyo.ac.jp/toyota_lab/

    • Related Report
      2017 Annual Research Report 2016 Annual Research Report

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Published: 2016-04-21   Modified: 2020-03-30  

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