极性自组装单层膜取向铁电液晶器件  

Alignment of Ferroelectric Liquid Crystal Device Using a Polar Self-Assembled Monolayer

作　　者：邹忠飞[1,2] 唐先柱[1,2] 季新建[1,2] 鲁星海[1] 宣丽[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室,吉林长春130033 [2]中国科学院研究生院,北京100039

出　　处：《液晶与显示》2009年第2期179-182,共4页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然科学基金(No.60578035,No.50473040);吉林省科技厅基金(No.20050520,No.20050321-2)资助项目

摘　　要：采用极性自组装单层膜和摩擦的方法制备了非对称的液晶盒。在铁电液晶相变的过程中不施加电场,得到了排列均一的铁电液晶器件。实验表明:极性自组装单层膜极性越大器件的对比度越高。经过分析得出该器件液晶分子取向机理为:基板附近的铁电液晶通过偶极和极性自组装膜的作用,使得靠近自组装膜表面处的偶极和靠近摩擦表面的偶极的指向相同,通过分子的相互作用使得体内分子排列方向一致。A mono-domain ferroelectric liquid crystal device （FLCD） has been fabricated using an asymmetric cell, typically the combination of a polar self-assembled monolayer （SAM） for one substrate and a rubbed polyimide for the other substrate. The contrast ratio increases with the polarity of SAM. It is believed that the directions of Ps near the SAM and the rubbed substrates are same by the action of Ps and SAM, then via molecule-molecule correlation through a surface-bulk transition region, the molecule in bulk is aligned along one direction.

关 键 词：铁电液晶 自组装单层膜 单畴 

分 类 号：O753.2[理学—晶体学]