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2009 Fiscal Year Final Research Report

Dynamical heterogeneity in the ionically conducting glasses from Molecular Dynamics Simulations

Research Project

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Project/Area Number 19540396
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Mathematical physics/Fundamental condensed matter physics
Research InstitutionTokyo Institute of Technology

Principal Investigator

HABASAKI Junko  Tokyo Institute of Technology, 大学院・総合理工学研究科, 助教 (10133331)

Project Period (FY) 2007 – 2009
Keywordsガラス / イオン伝導性 / 動的不均一性 / 分子動力学 / アルカリケイ酸塩 / マルチフラクタル
Research Abstract

大規模分子動力学(MD)シミュレーションを用いて、イオン伝導性ガラス中のイオンの動的不均一運動をミクロスコピックに解析した。速い運動と遅い運動の階層構造から形成される動的構造が複数のべき指数で構成されるマルチフラクタル性を有することを明らかにした。イオンの運動そのものについても、マルチフラクタル性を有することがわかった。これらの特徴を、f(α)スペクトルなどの普遍的な方法で表現することができた。
この複雑なイオンの運動の時空のフラクタル性を分離して評価し、ガラスのミステリーとして注目されてきた混合アルカリ効果(混合アルカリガラスで見られる非線形な輸送係数の減少)をジャンプ経路のフラクタル次元の変化として定量的に捉え説明することができた。更に、運動ベクトルの時系列の主成分解析によってイオンの協調運動を解析し、これが決定論的な性格の運動であることを明らかにした。これらの挙動の普遍性をイオン液体や一般化した二元系レナードジョーンズ系でも検証した。

  • Research Products

    (26 results)

All 2010 2009 2008 2007 Other

All Journal Article (10 results) (of which Peer Reviewed: 10 results) Presentation (15 results) Remarks (1 results)

  • [Journal Article] Molecular Dynamics Study of Thermodynamic Scaling of the Glass-Transition Dynamics in Ionic Liquids over Wide Temperature and Pressure Ranges2010

    • Author(s)
      J. Habasaki, R. Casalini, K.L. Ngai
    • Journal Title

      J. Phys. Chem. B 114

      Pages: 3902

    • Peer Reviewed
  • [Journal Article] Mixing effects in glass-forming Lennard-Jones mixtures2009

    • Author(s)
      L.-C. Valdes, F. Affouard, M. Descamps, J. Habasaki
    • Journal Title

      J. Chem. Phys. 130

      Pages: 154505

    • Peer Reviewed
  • [Journal Article] Breakdown of the Stokes-Einstein relation in Lennaard-Jones glassforming mixtures with different interaction potentialF. Affouard2009

    • Author(s)
      M. Descamps, L.-C. Valdes, J. Habasaki, P. Bordat, K.L. Ngai
    • Journal Title

      J. Chem. Phys 131

      Pages: 104510

    • Peer Reviewed
  • [Journal Article] Many-ion dynamics: the common view of CM and MC2009

    • Author(s)
      C. Leon, J. Habasaki, A. Rivera, K.L. Ngai
    • Journal Title

      Z. Phys, Chem. 223

      Pages: 1311-1325

    • Peer Reviewed
  • [Journal Article] Heterogeneous Dynamics of Ionic Liquids from Molecular Dynamics Simulations2008

    • Author(s)
      J. Habasaki, K.L. Ngai
    • Journal Title

      J. Chem. Phys. 129

      Pages: 194501

    • Peer Reviewed
  • [Journal Article] Molecular Dynamics Study of the Dynamics Near the Glass Transition in Ionic Liquids2008

    • Author(s)
      J. Habasaki, K.L. Ngai
    • Journal Title

      Analytical Sciences 24

      Pages: 1321-1327

    • Peer Reviewed
  • [Journal Article] Refinements in the Characterization of the Heterogeneous Dynamics of Li ions in Lithium Metasilicate2008

    • Author(s)
      J. Habasaki, K.L. Ngai
    • Journal Title

      J. Chem. Phys. 129

      Pages: 034503

    • Peer Reviewed
  • [Journal Article] Comparison of Ion Sites and Diffusion Paths in Glasses obtained by Molecular Dynamics Simulations and Bond Valence Analysis2007

    • Author(s)
      C. Muller, E. Zienicke, S. Adams, J. Habasaki, P. Maass
    • Journal Title

      Phys. Rev. B 75

      Pages: 014203(1-11)

    • Peer Reviewed
  • [Journal Article] The Mixed Alkali Effect in Ionically Conducting Glasses Revisited: A study by Molecular Dynamics Simulation2007

    • Author(s)
      J. Habasaki, K.L. Ngai
    • Journal Title

      Phys. Chem. Chem. Phys. 9

      Pages: 4673-4689

    • Peer Reviewed
  • [Journal Article] On the Nature of the Heterogeneous Dynamics of Ions in Ionic Conducting Glasses2007

    • Author(s)
      J. Habasaki
    • Journal Title

      J. Non-Cryst, Solids 353

      Pages: 3956-3968

    • Peer Reviewed
  • [Presentation] ソフトコア系の分子動力学法によるガラス転移温度の確定法とガラス状態2009

    • Author(s)
      上田顕、巾崎潤子、熊本
    • Organizer
      日本物理学会2009年秋季大会
    • Year and Date
      20090022
  • [Presentation] 単成分ソフトコア系の分子動力学法による研究***ガラス状態の生成へ向けて***2009

    • Author(s)
      上田顕、巾崎潤子
    • Organizer
      第23回分子シミュレーション討論会
    • Place of Presentation
      名古屋
    • Year and Date
      2009-12-01
  • [Presentation] ソフトコア系の分子シミュレーション-主成分解析によるガラス化傾向と結晶化傾向の分離-2009

    • Author(s)
      巾崎潤子、上田顕
    • Organizer
      第23回分子シミュレーション討論会
    • Place of Presentation
      名古屋
    • Year and Date
      2009-12-01
  • [Presentation] Molecular dynamics study of heterogeneous dynamics in ionic liquids-comparison with ionically conducting glasses2009

    • Author(s)
      J. Habasaki
    • Organizer
      1st International Workshop on Glass-Forming Systems
    • Place of Presentation
      Busan, Korea(招待講演)
    • Year and Date
      2009-11-07
  • [Presentation] Comparison of Heterogeneous Dynamics in Ionic Liquids and Ionically Conducting Glasses from Molecular Dynamics2009

    • Author(s)
      J. Habasaki, Kia L Ngai
    • Organizer
      The 3rd International Conference on Physics of Solid State Ionics, ICPSSI-3
    • Place of Presentation
      Kumamoto(招待講演)
    • Year and Date
      2009-10-28
  • [Presentation] Heterogeneous Dynamics of Ionic Liquids from Molecular Dynamics Simulation2009

    • Author(s)
      J. Habasaki
    • Organizer
      6th International Discussion Meeting of Relaxations in Complex Systems
    • Place of Presentation
      Rome(招待講演)
    • Year and Date
      2009-02-03
  • [Presentation] Heterogeneous Dynamics in Ionic Liquids2008

    • Author(s)
      J. Habasaki, K.L. Ngai
    • Organizer
      The fourth International Symposium on the New Frontiers of Thermal Studies of Materials
    • Place of Presentation
      Yokohama
    • Year and Date
      2008-12-01
  • [Presentation] Molecular Dynamics of Binary Lennard-Jones Mixtures: Breakdown of the Stokes-Einstein2008

    • Author(s)
      Relation. F. Affouard, M. Descamps, J. Habasaki
    • Organizer
      Unifying Concepts in Glass Physics IV
    • Place of Presentation
      Kyoto
    • Year and Date
      2008-11-28
  • [Presentation] Heterogeneous Dynamics and Glass Transition in Ionic Liquids2008

    • Author(s)
      J. Habasaki, K.L. Ngai
    • Organizer
      International Conference, Unifying Concepts in Glass Physics IV
    • Place of Presentation
      Kyoto
    • Year and Date
      2008-11-27
  • [Presentation] Molecular Dynamics Study of Dynamical Heterogeneity and Glass Transition in Ionic Liquids2008

    • Author(s)
      J. Habasaki, Kia L Ngai
    • Organizer
      2008 Joint Symposium on Molten Salts
    • Place of Presentation
      Kobe
    • Year and Date
      2008-10-22
  • [Presentation] Molecular Dynamics Studies of Ionically Conducting Glasses-The Mixed Alkali Effect Revisited-2007

    • Author(s)
      J. Habasaki, K.L. Ngai
    • Organizer
      ACERS 2007, Glass and Optic Materials Division Meeting & 18th University Conference on Glass
    • Place of Presentation
      Rochester, New York, USA(招待講演)
    • Year and Date
      20070000
  • [Presentation] Molecular Dynamics Studies of Ionically Conducting Glasses2007

    • Author(s)
      J. Habasaki, K.L. Ngai
    • Organizer
      Gordon Research Conference
    • Place of Presentation
      Plymouth, USA
    • Year and Date
      20070000
  • [Presentation] イオン液体における長時間緩和挙動の分子動力学2007

    • Author(s)
      巾崎潤子、K.L. Ngai
    • Organizer
      分子シミュレーション討論会
    • Place of Presentation
      金沢
    • Year and Date
      2007-11-26
  • [Presentation] Molecular dynamics of generalized binary Lennard-Jones systems2007

    • Author(s)
      J. Habasaki, F. Affouard, M. Descamps, K.L. Ngai
    • Organizer
      Fukuoka International Workshop, Unified concepts of glass transition
    • Place of Presentation
      (Fukuoka)
    • Year and Date
      2007-11-23
  • [Presentation] Molecular dynamics of generalized binary Lennard-Jones systems: effects of anharmonicity and breakdown of the Stokes-Einstein relation2007

    • Author(s)
      J. Habasaki, F. Affouard, M. Descamps, K.L. Ngai
    • Organizer
      5th International Workshop on Complex Systems
    • Place of Presentation
      Sendai
    • Year and Date
      2007-09-26
  • [Remarks]

    • URL

      http://t2r2.star.titech.ac.jp/cgi-bin/researcherinfo.cgi?q_researcher_content_number=CTT100381175

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Published: 2011-06-18   Modified: 2016-04-21  

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