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2009 Fiscal Year Final Research Report

Study on the choresteric-smectic isothermal phase transition inducedby application of electric field

Research Project

  • PDF
Project/Area Number 19350096
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Functional materials/Devices
Research InstitutionTokyo University of Science

Principal Investigator

SASAKI Takeo  Tokyo University of Science, 理学部, 准教授 (80261501)

Project Period (FY) 2007 – 2009
Keywords液晶材料 / 素子
Research Abstract

A series of cholesteric liquid crystals possessing three ring structure as a mesogenic unit was synthesized. The liquid crystal exhibited an isothermal phase transition from planer phase to focal conic phase when an electric field was applied to the LC. The focal conic phase showed electro optical switching. The response time of the electro optical switching was about 600 micro s. The focal conic phase exhibited a spontaneous polarization of 5nC/cm^2. Those results indicate that the focal conic phase was a ferroelectric phase. Thus, It was shown that the cholesteric LC synthesized in this study exhibits isothermal phase transition from cholesteric phase to ferroelectric phase. The cholesteric LC shows three-states electro optical switching under application of electric field.

  • Research Products

    (11 results)

All 2009 2008 2007 Other

All Journal Article (6 results) Presentation (4 results) Remarks (1 results)

  • [Journal Article] Photorefractive Effect of Polymer-Stabilized Ferroelectric Liquid Crystals2009

    • Author(s)
      T. Sasaki, Y. Nakazawa
    • Journal Title

      J. Phys. Chem. C 113

      Pages: 5792-5798

  • [Journal Article] Photorefractive Effect of Ferroelectric Liquid Crystals with Application of a Biased Alternating Electric Field2008

    • Author(s)
      N. Moriya, T. Sasaki
    • Journal Title

      Mol. Cryst. Liq. Cryst. 482

      Pages: 33-41

  • [Journal Article] Influence of Rubbing Condition of Polyimide Alignment Layer on Optical Anisotropy of Immobilized Liquid Crystal Film2007

    • Author(s)
      M. Yamahara, M. Nakamura, N. Koide, T. Sasaki
    • Journal Title

      Liq. Cryst. 34

      Pages: 381-387

  • [Journal Article] Relationship between Molecular Orientation of Rubbed Polyimide Alignment Layer and Immobilized Liquid Crystal Film Coated on The Alignment Layer2007

    • Author(s)
      M. Yamahara, M. Nakamura, N. Koide, T. Sasaki
    • Journal Title

      Mol. Cryat. Liq. Cryst. 466

      Pages: 39-52

  • [Journal Article] Relationship between Optical Properties of Immobilized Liquid Crystal Film and that of Polyimide Alignment Layer2007

    • Author(s)
      M. Yamahara, M. Nakamura, N. Koide, T. Sasaki
    • Journal Title

      Mol. Cryat. Liq. Cryst. 473

      Pages: 3-14

  • [Journal Article] Photorefractive Effect of Ferroelectric Liquid Crystals with Application of Alternating Electric field2007

    • Author(s)
      T. Sasaki, N. Moriya, Y. Iwasaki
    • Journal Title

      J. Phys. Chem. C 111

      Pages: 17646-17652

  • [Presentation] 高分子安定化コレステリック液晶のplaner/focalconic転移における電界応答挙動の解析2009

    • Author(s)
      鳥海裕貴、佐々木健夫
    • Organizer
      日本液晶学会討論会
    • Place of Presentation
      東京農工大
    • Year and Date
      2009-09-16
  • [Presentation] コレステリック液晶のフレクソエレクトリック効果に及ぼす配向条件の影響2008

    • Author(s)
      浜本浩史、佐々木健夫
    • Organizer
      第57回高分子学会年次大会
    • Place of Presentation
      パシフィコ横浜
    • Year and Date
      2008-05-29
  • [Presentation] N*相における特異的電界挙動2007

    • Author(s)
      赤堀陽介、佐々木健夫
    • Organizer
      日本液晶学会討論会
    • Place of Presentation
      東工大
    • Year and Date
      2007-09-12
  • [Presentation] キラルネマチック相の電界応答に及ぼす配向処理の影響2007

    • Author(s)
      浜本浩史、佐々木健夫
    • Organizer
      日本液晶学会討論会
    • Place of Presentation
      東工大
    • Year and Date
      2007-09-12
  • [Remarks]

    • URL

      http://www.rs.kagu.tus.ac.jp/~photoref/index.htm

URL: 

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

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