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2007 Fiscal Year Annual Research Report

電荷・極性の関与するソフトマターの新しい相及びせん断の関与する非平衡現象の研究

Planned Research

Project AreaCreation of non-equilibrium soft matter physics: Structure and dynamics of mesoscopic systems
Project/Area Number 18068012
Research InstitutionKyoto University

Principal Investigator

小貫 明  Kyoto University, 理学研究科, 教授 (90112284)

Co-Investigator(Kenkyū-buntansha) 八尾 誠  京都大学, 理学研究科, 教授 (70182293)
瀬戸 秀紀  京都大学, 理学研究科, 准教授 (60216546)
山本 量一  京都大学, 工学研究科, 准教授 (10263401)
金谷 利治  京都大学, 化学研究所, 教授 (20152788)
Keywordsソフトマター / 相転移 / 非平衡 / せん断 / 電荷 / ガラス / 構造形成 / 分極効果
Research Abstract

ソフトマターにおける相転移・構造形成においては電荷の効果とともに水分子などの強い分極効果が大きな役割を果たしているが充分研究されてはいない。
本研究は理論・シミュレーションによる解析(小貫・山本)と実験的解析(八尾・瀬戸・金谷)を有機的に組み合わせて実施した。以下に具体的な成果を示す。アモルファス状態のレオロジーはソフトな物質から硬い合金に至るまで広範囲に重要な未知の現象であり、その本質に迫るため、ガラス状態で大規模シミュレーションを実行した。さらにイオン液晶や極性の高い臨界溶液などの3次元シミュレーションの計画を進行中である。八尾グループでは、瀬戸グループでも取り扱っている水-アルコール混合系に塩を加えた系について、動的光散乱法(DLS)を用いて表面張力波の測定を行った。
なお、市販のDLS装置では、水平面内での散乱を測定するため、表面張力波の測定は不可能であるが、八尾グループでは、自作の装置を立ち上げてこれを可能にした(八尾)。メチルピリジンと水の系に塩を加えた場合に臨界点近傍で形成される巨大クラスター構造について、光散乱と中性子小角散乱を用いて調べた(瀬戸)。薄膜や細孔に閉じ込められた拘束系高分子ガラスはバルクガラスとは非常に異なる物性を示す。バルクガラス状態よりもはるかに大きな動的不均一性が異常物性の原因になっていること示した。問題解決のために、緩和時間の周波数分布、空間分布を定量的に評価し、動的不均一性を中性子反射率と中性子非弾性散乱測定により明らかにした(金谷)。

  • Research Products

    (27 results)

All 2008 2007

All Journal Article (15 results) (of which Peer Reviewed: 15 results) Presentation (12 results)

  • [Journal Article] Study of liquid metals as a basis for nanoscience2008

    • Author(s)
      M. Yao and Y. Ohmasa
    • Journal Title

      Journal of Physics: Condensed Matter 20

      Pages: 114101

    • Peer Reviewed
  • [Journal Article] Hydration Process of Multi-stacked Phospholipid Bilayersto form Giant Vesicles2008

    • Author(s)
      M. Hishida, H. Seto, N.L. Yamada, and Kenichi Yoshikawa
    • Journal Title

      Chem. Phys. Lett. 455

      Pages: 297-302

    • Peer Reviewed
  • [Journal Article] Thermoacoustic effects in supercritical fluids near the critical point: Resonance, piston effect, and acoustic emission and reflection2007

    • Author(s)
      A. Onuki
    • Journal Title

      Physical Review E 76

      Pages: 61126

    • Peer Reviewed
  • [Journal Article] A Periodic Structure in a Mixture of D20/3- Methylpyridine/NaBPh4 Induced by Solvation Effect2007

    • Author(s)
      K. Sadakane, H. Seto, H. Endo, and M. Shibayama
    • Journal Title

      Journal of Physical Society of Japan 76

      Pages: 113602

    • Peer Reviewed
  • [Journal Article] Gelation-Induced Phase Separation of Poly (vinyl alcohol)in Mixed Solvents of Dimethyl Sulfoxide and Water2007

    • Author(s)
      N. Takahashi, T. Kanaya, K. Nishida, and K. Kaji
    • Journal Title

      Macromolecules 40

      Pages: 8750-8755

    • Peer Reviewed
  • [Journal Article] Crystallization of Polyethylene Blends under Shear Flow. Effects of Crystallization Temperature and Ultrahigh2007

    • Author(s)
      G. Matsuba, S. Sakamoto, Y. Ogino, K. Nishida, T. Kanaya
    • Journal Title

      Macromolecules 40

      Pages: 7270-7275

    • Peer Reviewed
  • [Journal Article] Hierarchic Structure of Shish-Kebab by Neutron Scattering in a Wide Q Range2007

    • Author(s)
      T. Kanaya, et. al.
    • Journal Title

      Macromolecules 40

      Pages: 3650-3654

    • Peer Reviewed
  • [Journal Article] Dynamic anisotropy and heterogeneity of polystyrene thinfilms as studied by inelastic neutron scattering2007

    • Author(s)
      R. Inoue, et. al.
    • Journal Title

      Eur. Phys. J. E 24

      Pages: 55-60

    • Peer Reviewed
  • [Journal Article] Lower critical solution temperature type of phase separation in aqueous mixture of polyelectrolytes2007

    • Author(s)
      T. Tsubouchi, K. Nishida, and T. Kanaya
    • Journal Title

      Colloids and Surfaces B: Biointerfaces 56

      Pages: 265-369

    • Peer Reviewed
  • [Journal Article] Phase transition in compressible Ising systems at fixed2007

    • Author(s)
      A. Onuki and A. Minami
    • Journal Title

      Phys. Rev. B 76

      Pages: 174427

    • Peer Reviewed
  • [Journal Article] Domain-induced budding in buckling membranes2007

    • Author(s)
      A. Minami and K. Yamada
    • Journal Title

      Euro. Phys. J. E 23

      Pages: 1292

    • Peer Reviewed
  • [Journal Article] Strict simulations of non-equilibrium dynamics of colloids2007

    • Author(s)
      R. Yamamoto, K. Kang, and Y. Nakayama
    • Journal Title

      Colloids and Surfaces A: Physicochemical and Engineering Aspects 311

      Pages: 33

    • Peer Reviewed
  • [Journal Article] Heterogeneous dynamics in polycrystal and glass in a binary mixture with changing size dispersity and2007

    • Author(s)
      T. Hamanaka and A. Onuki
    • Journal Title

      Phys. Rev. E 75

      Pages: 41503

    • Peer Reviewed
  • [Journal Article] Dynamic van der Waals theory2007

    • Author(s)
      A. Onuki
    • Journal Title

      Phys. Rev. E 75

      Pages: 36304

    • Peer Reviewed
  • [Journal Article] Nonlinear elasticity theory of dislocation formation and composition change in binary alloys in three dimensions2007

    • Author(s)
      A. Minami and A. Onuki
    • Journal Title

      Acta Materialia 55

      Pages: 2375-2384

    • Peer Reviewed
  • [Presentation] Neutron Scattering on Soft Condensed Matter2008

    • Author(s)
      H. Seto
    • Organizer
      India-Japan Workshop on Quantum Beam Science
    • Place of Presentation
      Kolkata(India)
    • Year and Date
      20080307-12
  • [Presentation] Long Period Structure in a Mixture of D20/3-Methylpyridine/NaBPh4 induced by Solvation Effect2008

    • Author(s)
      K. Sadakane, H. Seto, H. Endo and M. Shibayama
    • Organizer
      8th Korea-Japan Meeting on Neutron Science
    • Place of Presentation
      Kyoto
    • Year and Date
      20080218-19
  • [Presentation] Direct numerical simulations of colloidal dispersions: electrophoresis, thermal fluctuations, shear thickening,2008

    • Author(s)
      R. Yamamoto and T. Iwashita
    • Organizer
      International Symposium "Frontiers of Advanced Particle Handling Science
    • Place of Presentation
      Kyoto
    • Year and Date
      20080128-29
  • [Presentation] Experimental evidence of hardening of lipid bilayers in the anomalous swelling regime2007

    • Author(s)
      H. Seto, N. L. Yamada, M. Hishida, M. Nagao and T. Takeda
    • Organizer
      The Second Japan-Taiwan Workshop on Neutron Scattering of Bio-materials, Soft-Matters and
    • Place of Presentation
      Wulai(Taiwan)
    • Year and Date
      20071204-07
  • [Presentation] Supercooled Liquids under Shear-Computational analysis on single and collective particle motions-2007

    • Author(s)
      R. Yamamoto
    • Organizer
      Workshop on Fundamental Issues in Metallic Glasses
    • Place of Presentation
      Guilin and Kunming(China)
    • Year and Date
      20071022-26
  • [Presentation] Bending rigidity of lipid bilayers in the anomalous swelling regime determined by neutron spin echo2007

    • Author(s)
      H. Seto
    • Organizer
      International Soft Matter Conference 2007
    • Place of Presentation
      Aachen(Germany)
    • Year and Date
      20071001-04
  • [Presentation] Theoretical study of phase separation in electrolytes2007

    • Author(s)
      A. Minami and A. Onuki
    • Organizer
      New Frontiers in Colloidal Physics: A Bridge between Micro-and Macroscopic Concepts
    • Place of Presentation
      Kyoto
    • Year and Date
      20070725-27
  • [Presentation] Wetting dynamics with evaporation and condensation2007

    • Author(s)
      R. Teshigawara and A. Onuki
    • Organizer
      New Frontiers in Colloidal Physics: A Bridge between Micro-and Macroscopic Concepts
    • Place of Presentation
      Kyoto
    • Year and Date
      20070725-27
  • [Presentation] Wetting dynamics with evaporation and condensation2007

    • Author(s)
      R. Teshigawara and A. Onuki
    • Organizer
      STATPHYS 2007
    • Place of Presentation
      Genova(Itaty)
    • Year and Date
      20070709-13
  • [Presentation] Plastic deformation of solids2007

    • Author(s)
      A. Minami and A. Onuki
    • Organizer
      STATPHYS 23
    • Place of Presentation
      Genova(Italy)
    • Year and Date
      20070709-13
  • [Presentation] study of Liquid Metals as a Basis for Nano-Science2007

    • Author(s)
      M. Yao and Y. Ohmasa
    • Organizer
      13th International Conference on Liquid and Amorphous Metals
    • Place of Presentation
      Ekaterinburg(Russia)
    • Year and Date
      20070708-14
  • [Presentation] Ginzburg-Landau theory of ions and ionic surfactants in polar solvent2007

    • Author(s)
      A. Onuki
    • Organizer
      International Soft Matter Conference 2007
    • Place of Presentation
      Aachen(Germany)
    • Year and Date
      2007-10-04

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Published: 2010-02-04   Modified: 2016-04-21  

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