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2010 Fiscal Year Annual Research Report

ゲスト成分が誘起するソフトマターメソ構造の相転移ダイナミクス

Planned Research

Project AreaCreation of non-equilibrium soft matter physics: Structure and dynamics of mesoscopic systems
Project/Area Number 18068007
Research InstitutionOchanomizu University

Principal Investigator

今井 正幸  お茶の水女子大学, 大学院・人間文化創成科学研究科, 教授 (60251485)

Co-Investigator(Kenkyū-buntansha) 田中 肇  東京大学, 生産技術研究所, 教授 (60159019)
奥村 剛  お茶の水女子大学, 大学院・人間文化創成科学研究科, 教授 (80271500)
Keywordsソフトマター / モデル生体膜 / 両親媒性分子膜とコロイド複合系 / 構造化表面 / リピッドソーティング / 両親媒性分子膜と高分子複合系 / 濡れ転移 / シミュレーション
Research Abstract

本グループは、異種なソフトマターを混合するなど系をエキゾチックな状態において、その状態で観察される特異な現象の理解とそれを用いたメソ構造の制御を目指すものである。以下の3つのテーマについて研究を進めた。
(1)幾何学的形状の異なる2種類の脂質を混合させた場合、その幾何学的なフラストレーションにより様々なベシクルの変形が誘起される。その中でも、コーン型脂質とシリンダー型脂質を混合したベシクルでは温度サイクルにより孔が形成されるとともに、孔の縁に膜がロールした様な構造が形成される。このロール状膜構造が確かに脂質2分子膜の内膜と外膜の幾何学的非対称性によって引き起こされている事を、中性子小角散乱のコントラストマッチング法により明確にし、生体膜におけるリピッドソーチングの存在を実験的に検証した。
(2)コロイド分散系においてソフトマターにおける重要な非エルゴート状態の一つであるゲルの形成について、共焦点レーザ顕微鏡によるに一粒子レベルの観察を行った。ゲル化におけるダイナミクスの凍結に局所安定構造の形成が重要な役割を演じていることを明らかにするとともに、メゾスコピックな構造内の動的な不均一性が明らかにされ、隣接粒子数の少ない表面部とそれが多い中心部という空間的な特徴との相関が明らかになった。
(3)マイクロパターンを持つ表面は、濡れ性をはじめとする様々な観点から工学的応用が期待されている。浸透現象についてアスペクト比が小さい表面を持った表面を使った実験を行い、従来とは異なるべき乗則を得た。さらに、三角状の起伏をもつ構造化表面のうえでの接触角履歴に関し、粘性散逸とは異なる物理的起源による定量的でシンプルな理論を構築した

  • Research Products

    (28 results)

All 2011 2010 Other

All Journal Article (16 results) (of which Peer Reviewed: 16 results) Presentation (10 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Possible Link of the V-Shaped Phase Diagram to the Glass-Forming Ability and Fragility in a Water-Salt Mixture2011

    • Author(s)
      M.Kobayashi, H.Tanaka
    • Journal Title

      Phys.Rev.Lett.

      Volume: 106 Pages: 125703(1-4)

    • Peer Reviewed
  • [Journal Article] The Effect of Inter-Cluster Interactions on the Structure of Colloidal Clusters2011

    • Author(s)
      A.Malins, S.R.Williams, J.Eggers, H.Tanaka, C.P.Royall
    • Journal Title

      Journal of Non-Crystalline Solids

      Volume: 357 Pages: 760-766

    • Peer Reviewed
  • [Journal Article] Diffusion of Domains on Nanometer Sized Vesicle2010

    • Author(s)
      Y.Sakuma, N.Urakami, Y.Ogata, M.Nagao, S.Komura, T.Kawakatsu, M.Imai
    • Journal Title

      J.Phys.Conf.Ser.

      Volume: 251 Pages: 12036(1-4)

    • Peer Reviewed
  • [Journal Article] Periodic Modulation of Tubular Vesicles Induced by Phase Separation2010

    • Author(s)
      M.Yanagisawa, M.Imai, T.Taniguchi
    • Journal Title

      Phys.Rev.E

      Volume: 82 Pages: 051928(1-9)

    • Peer Reviewed
  • [Journal Article] Shape Deformation of Giant Vesicles Encapsulating Charged Colloidal Particles2010

    • Author(s)
      Y.Natsume, O.Pravaz, H.Yoshida, M.Imai
    • Journal Title

      Soft Matter

      Volume: 6 Pages: 5359-5366

    • Peer Reviewed
  • [Journal Article] Pore Formation in a Binary Giant Vesicle Induced by Cone-Shaped Lipids2010

    • Author(s)
      Y.Sakuma, T.Taniguchi, M.Imai
    • Journal Title

      Biophys.J.

      Volume: 99 Pages: 472-479

    • Peer Reviewed
  • [Journal Article] Order-disorder Transition of Nonionic Onions under Shear Flow2010

    • Author(s)
      Y.Suganuma, M.Imai, T.Kato, U.Olsson, T.Takahashi
    • Journal Title

      Langmuir

      Volume: 26 Pages: 7988-7995

    • Peer Reviewed
  • [Journal Article] Bond Orientational Ordering in a Metastable Supercooled Liquid : a Shadow of Crystallization and Liquid-Liquid Transition2010

    • Author(s)
      H.Tanaka
    • Journal Title

      J.Stat.Mech.

      Pages: P12001(1-27)

    • Peer Reviewed
  • [Journal Article] Formation of a Crystal Nucleus from Liquid2010

    • Author(s)
      T.Kawasaki, H.Tanaka
    • Journal Title

      PNAS

      Volume: 107 Pages: 14036-14041

    • Peer Reviewed
  • [Journal Article] Super diffusive Mass Transport as a Causal Mechanism for Large-Scale Structure Formation2010

    • Author(s)
      D.A.Head, H.Tanaka
    • Journal Title

      Europhysics Letters

      Volume: 91 Pages: 40008(1-6)

    • Peer Reviewed
  • [Journal Article] Surface-Wetting Effects on the Liquid-Liquid Transition of a Single-Component Molecular Liquid2010

    • Author(s)
      K.Murata, H.Tanaka
    • Journal Title

      Nature Communications

      Volume: 1 Pages: 16(1-9)

    • Peer Reviewed
  • [Journal Article] Structural Origin of Dynamic Heterogeneity in Three-Dimensional Colloidal Glass Formers and its Link to Crystal Nucleation2010

    • Author(s)
      T.Kawasaki, H.Tanaka
    • Journal Title

      J.Phys : Condens.Matter

      Volume: 22 Pages: 232102(1-10)

    • Peer Reviewed
  • [Journal Article] Critical-Like Behaviour of Glass-Forming Liquids2010

    • Author(s)
      H.Tanaka, T.Kawasaki, H.Shintani, K.Watanabe
    • Journal Title

      Nature Materials

      Volume: 9 Pages: 324-331

    • Peer Reviewed
  • [Journal Article] Structural and Dynamical Features of Multiple Metastable Glassy States in a Colloidal System with Competing Interactions2010

    • Author(s)
      C.L.Klix, C.P.Royall, H.Tanaka
    • Journal Title

      Phys.Rev.Lett

      Volume: 104 Pages: 165702(1-4)

    • Peer Reviewed
  • [Journal Article] Numerical investigations of the dynamics of two-component vesicles

    • Author(s)
      T.Taniguchi, M.Yanagisawa, M.Imai
    • Journal Title

      J.Phys.Cond.Matt.

      Volume: (印刷中)

    • Peer Reviewed
  • [Journal Article] Asymmetric distribution of cone-shaped lipids in a highly curved bilayer revealed by a small angle neutron scattering technique

    • Author(s)
      Y.Sakuma, N.Urakami, T.Taniguchi, M.Imai
    • Journal Title

      J.Phys.Cond.Matt.

      Volume: (印刷中)

    • Peer Reviewed
  • [Presentation] Hidden Critical-Like Structural Ordering in a Supercooled Liquid : Its Link to Dynamic Heterogeneity and Crystal Nucleation2010

    • Author(s)
      H.Tanaka
    • Organizer
      APCTP Workshop on Current Progress of Simulations in Complex Systems
    • Place of Presentation
      Pohang, Korea
    • Year and Date
      20101115-20101117
  • [Presentation] Shape Deformations of Multi-component Vesicles2010

    • Author(s)
      Y.Sakuma, M.Imai
    • Organizer
      467th Wilhelm and Else Heraeus Seminar BIOPHYSICS OF MEMBRANE TRANS FORMATIONS Workshop
    • Place of Presentation
      Bad Honnef, Germany
    • Year and Date
      20101026-20101030
  • [Presentation] Wetting-Induced Interactions between Colloids Immersed in a Critical Binary Mixture2010

    • Author(s)
      H.Tanaka
    • Organizer
      International Workshop of Fluctuation-Induced Forces in Condensed Matter
    • Place of Presentation
      Dresden, Germany
    • Year and Date
      20101011-20101015
  • [Presentation] Critical-Like Structural Ordering in a Supercooled Liquid : Itslink to Dynamic Heterogeneity and Crystal Nucleation2010

    • Author(s)
      H.Tanaka, T.Kawasaki, H.Shintani, K.Watanabe
    • Organizer
      Workshop on the Dynamics of the Glass/Jamming Transition in celebration of the 80th birthday of Prof.Kyozi Kawasaki
    • Place of Presentation
      Busan, Korea
    • Year and Date
      20100908-20100911
  • [Presentation] Shape Deformations of Multi-component Vesicles2010

    • Author(s)
      Y.Sakuma, T.Taniguchi, S.Komura, T.Kawakatsu, M.Imai
    • Organizer
      International symposium on Non-Equilibrium Soft Matter
    • Place of Presentation
      Nara, Japan
    • Year and Date
      20100817-20100820
  • [Presentation] Hidden Structural Ordering in a Supercooled Liquid : Intrinsic Link between Glass Transition and Crystallization2010

    • Author(s)
      H.Tanaka, T.Kawasaki, H.Shintani, K.Watanabe
    • Organizer
      International Symposium on Non-Equilibrium Soft Matter 2010
    • Place of Presentation
      Nara, Japan
    • Year and Date
      20100817-20100820
  • [Presentation] Inter-membrane Interactions Modulated by Addition of Guest Components2010

    • Author(s)
      M.Imai
    • Organizer
      21th IUPAC International Conference on Chemical Thermodynamics
    • Place of Presentation
      Tsukuba, Japan
    • Year and Date
      20100801-20100806
  • [Presentation] Hidden Critical-Like Structural Ordering in a Supercooled Liquid and its Roles in Crystal Nucleation2010

    • Author(s)
      H.Tanaka
    • Organizer
      WPI-AIMR Seminar
    • Place of Presentation
      Sendai, Japan
    • Year and Date
      20100729-20100730
  • [Presentation] Hidden Critical-Like Structural Ordering in a Supercooled Liquid and its Roles in Crystal Nucleation2010

    • Author(s)
      H.Tanaka
    • Organizer
      XXIV International Conference on Statistical Physics
    • Place of Presentation
      Cairns, Australia
    • Year and Date
      20100719-20100723
  • [Presentation] Structural Origin of Dynamic Heterogeneity in Colloidal Liquids and its Link to Crystal Nucleation2010

    • Author(s)
      H.Tanaka
    • Organizer
      KITP Program : The Physics of Glasses : Relating Metallic Glasses to Molecular, Polymeric and Oxide Glasses
    • Place of Presentation
      Santa Barbara, USA
    • Year and Date
      20100621-20100625
  • [Book] Advances in planar lipid bilayers and liposomes Vol.12 chapter 3, Shape deformations of multi-component vesicles2010

    • Author(s)
      M.Imai, Y.Sakuma
    • Total Pages
      37
    • Publisher
      Elsevier
  • [Remarks]

    • URL

      http://sofia.phys.ocha.ac.jp/imailab/index.html

URL: 

Published: 2012-07-19  

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