Characterization of Nematic Phase of Banana Liquid Crystal

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We report the first detailed optical and electrical characterizations of the nematic (N) phase of a banana liquid crystal, i.e., pretilt angle, and optical and dielectric anisotropies, and point out the difference from those of rodlike molecules. The pretilt angle measurements using a conventional crystal rotation method show that the pretilt angle is very small (less than 1°) even in cells with a polyimide film yielding a high pretilt angle like 8° for calamitic molecules. We also measured the birefringence $\Delta n$ in the N phase as a function of temperature and estimated the orientational order parameter $S$. The medium shows a small negative dielectric anisotropy in the N phase and the anisotropy becomes large in the B2 phase mainly because of the tilt of the molecules from the layer normal.

収録刊行物

  • Japanese journal of applied physics. Pt. 2, Letters  

    Japanese journal of applied physics. Pt. 2, Letters 45(37), L1013-L1015, 2006-10-25 

    Japan Society of Applied Physics

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各種コード

  • NII論文ID(NAID)
    10018340561
  • NII書誌ID(NCID)
    AA10650595
  • 本文言語コード
    EN
  • 資料種別
    SHO
  • ISSN
    0021-4922
  • NDL 記事登録ID
    8519736
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z54-J337
  • データ提供元
    CJP書誌  NDL  JSAP 
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