X狀及盤狀分子之引入具偶極形成雙軸向列液晶相之探討

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Title:	X狀及盤狀分子之引入具偶極形成雙軸向列液晶相之探討
Other Titles:	Incorporating a polar group onto cross-like and disc-like mesogens for generation the biaxial nematic phases
Authors:	陳柏蓉;Chen, Po-Jung
Contributors:	淡江大學化學學系碩士班徐秀福;Hsu, Hsiu-Fu
Keywords:	雙軸向列相;cross-like;biaxial nematic phase
Date:	2011
Issue Date:	2011-12-28 18:10:46 (UTC+8)
Abstract:	理論計算顯示雙軸性向列型液晶分子較單軸性向列型液晶分子於電場中有更快的應答時間，因此若應用於顯示器可大幅改善影像遲滯現象。本篇研究利用修改X狀以及盤狀向列型液晶分子的幾何形狀並引入極性單元，藉由引進強偶極產生分子間強偶極作用力，使得分子於空間中穩定排列成具雙光軸超分子結構。首先針對修改分子幾何形狀以及引入極性單元對形成雙軸性液晶的影響，接著利用偏光顯微鏡觀測以光學錐光偏振鏡檢法驗證雙軸性，並於磁場配向下以粉末X光繞射進一步證明雙軸性向列液晶相的存在。 It was proposed by theory that biaxial liquid crystals are predicted to exhibit significantly shorter switching time than uniaxial ones used in liquid crystal displays. In this thesis, modify the structural and incorporate a polar group onto cross-like and disc-like mesogens for the generation of biaxial nematic phases with stronger intermolecular dipole interaction. Their biaxiallity was envestigated and verified by conoscopic and X-ray diffraction studies.
Appears in Collections:	[Graduate Institute & Department of Chemistry] Thesis

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