English  |  正體中文  |  简体中文  |  Items with full text/Total items : 62379/95055 (66%)
Visitors : 2294616      Online Users : 161
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/114252

    Title: 以不對稱交叉分子結構形成寬廣溫度範圍室溫藍相液晶之研究
    Other Titles: Achieving wide-temperature-range room-temperature blue phase liquid crystal by unsymmetrical cross-like mesogens
    Authors: 蘇建彰;Su, Chien-Jhang
    Contributors: 淡江大學化學學系碩士班
    徐秀福;Hsu, Hsiu-Fu
    Keywords: blue phase;unsymmetrical cross-like liquid crystal;wide-temperature range;不對稱交叉狀分子;寬廣溫度範圍;藍相液晶
    Date: 2017
    Issue Date: 2018-08-03 14:46:36 (UTC+8)
    Abstract: 本論文將會對所合成寬廣溫度的藍相液晶化合物進行設計、合成與液晶性質探討。
    藍相液晶應用於顯示器上會優於市面上的向列相液晶,其展現出短的應答時間、在顯示器暗態時為光學各相同性與不需要配相層等優勢。但已發表的藍相液晶之藍相只能維持在一個狹隘的溫度範圍 (約2 oC),使得其難以使用在液晶顯示器上。
    In this thesis, the design, synthesis and liquid crystal properties of those wide-temperature-range room-temperature blue phase (BP) liquid crystals (LCs) are reported.
    Blue phase liquid crystals exhibit short response time, optically isotropic dark state, and no need for molecular alignment layers to outperform nematic LCs currently used in displays. However, reported BPLCs are usually formed within a narrow temperature range (about 2 oC), which is disadvantageous for practical display applications.
    For obtaining wide-temperature-range room-temperature blue phases, it is necessary to stabilized the double twisted cylinder molecular packing structures. Molecules showing biaxial liquid crystalline phases were known to be able to stabilize molecular packing suprastructures of blue phases.
    Herein, molecular design of the unsymmetrical cross-like geometry with chiral side-chains are practiced and blue phases of wide-temperature-ranges are achieved. By using POM and PXRD, biaxial properties of the nematic phase is confirmed. Further structural modification on the peripheral rings of the cross-like mesogens makes the temperature range of blue phases to nearly include room-temperature.
    Appears in Collections:[化學學系暨研究所] 學位論文

    Files in This Item:

    File Description SizeFormat

    All items in 機構典藏 are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback