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Instability of Pattern Mode in Nematic Liquid Crystal

Research Project

Project/Area Number 01540293
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 物性一般(含極低温・固体物性に対する理論)
Research InstitutionTokyo Institute of Technology

Principal Investigator

TSUCHIYA Y.  Tokyo Institute of Technology Biological Sciences, Ass. Prof., 生命理工学部, 助教授 (50134812)

Co-Investigator(Kenkyū-buntansha) KAWAKUBO T.  Tokyo Institute of Technology, Appl. Physics, Prof., 理学部, 教授 (10016040)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1990: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1989: ¥1,900,000 (Direct Cost: ¥1,900,000)
KeywordsLiquid Crystal / Electrohydrodynamics / Williams Domain / Pattern Forming / Flattness / Lorentian / パタ-ン振動 / 空間構造 / 電気流体 / ネマティック液晶 / カオス化過程 / ウイリアムズドメイン
Research Abstract

We have experimentally studied a forming process of the Williams domain which appears above a threshold of voltage applied across a thin layer of liquid crystal. Temporal behaviors of the image intensity representing a structure of the stripped pattern have been investigated for the thin layers of liquid crystal confined in cells with some different aspect ratios and have been analyzed by the method of Fourier transformation. We have found that a wave number spectrum line, which reflects the structure of Williams domain, appears in the initial stage of the forming process and evolves keeping a Lorentian line shape. The characteristics, furthermore, have been found to be independent of the cell size, which shows the forming process of Williams domain is caused from a bulk-like interaction in the electrohydrodynamics of liquid crystal. We have also found a flattness, which reflects local fluctuations of the Williams domain, increases in the early stage of the forming process. It has been understood that the growth of the local fluctuations facilitates the evolution of the main mode corresponding to the Williams domain.

Report

(3 results)
  • 1991 Final Research Report Summary
  • 1990 Annual Research Report
  • 1989 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] Y.Tsuchiya: "Window-like Coherent States and Their Subharmonic Bifuracations in a Succesive Transition Process of the Williams Domain" J.Phys.Soc.Japan. 57. 691-694 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Y.Tsuchiya: "Pattern Dynamics in the Forming Process of the Williams Domain"

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Y. Tsuchiya: "Window-like Coherent States and Their Subharmonic Bifurcations in a Succesive Transition Process of the Williams Domain" J. Phys. Soc. Japan. 57. 691-694 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Y. Tsuchiya: "Pattern Dynamics in the Forming Process of the Williams Domain"

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Y.Tsuchiya: "Windowーlike Coherent States and Their Subharmonic Bifurcations in a Succesive Transition Process of the Williams Domain." J.Phys.Soc.Jpn. 57. 691-694 (1988)

    • Related Report
      1990 Annual Research Report
  • [Publications] Y.Tsuchiya: "Coherent Pattern Oscillation(OS2)of Williams Domain in Nematic Liquid Crystals." J.Phys.Soc.Jpn. 57. 669-670 (1988)

    • Related Report
      1990 Annual Research Report
  • [Publications] Y.Tsuchiya: "Spatial Dynamics of Electrohydrodynamic Pattern Oscillation in Nematic Liquid Crystal" J.Phy.Soc.Japan.

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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