Effects of silica nanoparticles on electro-optical properties of polymer-stabilized liquid crystals
Effects of silica nanoparticles on electro-optical properties of polymer-stabilized liquid crystals
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DOI：
10.1364/oe.22.018513
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发表时间：
2014-07-28
期刊：
影响因子：
3.8
通讯作者：
Huang, Chi-Yen
中科院分区：
文献类型：
--
作者：
Hsu, Che-Ju;Kuo, Chih-Chin;Huang, Chi-Yen
我们通过同时将二氧化硅纳米粒子（SNs）和反应性单体掺杂到液晶盒中来控制液晶（LCs）的预倾角。对液晶盒施加交流高压（ACHV）会产生提升力，并促使极性基团将SNs和单体移向基板表面。紫外线照射后，聚合物网络和SNs在基板表面稳定下来，使液晶保持在高预倾角。沉积在基板表面的SNs增加了基板的锚定能；液晶盒中分散的SNs降低了液晶的弛豫常数。因此，高预倾角聚合物稳定液晶盒的响应时间缩短。该方法能够在较宽范围内控制液晶的预倾角。加入SNs还可以防止因单体剂量高而导致的聚合物稳定液晶盒响应时间慢的问题。（C）2014美国光学学会
We control the pretilt angle of liquid crystals (LCs) by simultaneously doping silica nanoparticles (SNs) and reactive monomers into the LC cell. Application of AC high voltage (ACHV) to the cell compels the lifting force and the facilitation of polar groups to move the SNs and monomers toward the substrate surface. Polymer networks and SNs are stabilized at the substrate surface after UV exposure, sustaining the LCs at high pretilt angles. The deposited SNs on the substrate surface increases the anchoring energy of the substrate; the dispersed SNs in the cell decrease the relaxation constant of LCs. Therefore, the response time of the high-pretilted-polymer-stabilized LC cell is decreased. The method enables the control of the LC pretilt angle over a broad range. The slow response time of the polymer-stabilized LC cell from high monomer dose can also be prevented following the addition of SNs. (C)2014 Optical Society of America