2D12 全反射エリプソメトリによる光配向膜の特性解析

概要

論文の詳細を見る
Photocontrol of iiquid crystal (LC) alignment ires been achieved by photoreactive molecules at LC/substrate interfaces. We investigated dynamic surface-driven changes in LC alignment by a time-resolved ellipsometry. Both transmission and total-refiection ellipsometry were applied to observe reorientation processes of LCs in a bulk region and at an interfacial region. Pulsed THG laser beam of a Q-switched Nd:YAG laser was used to trigger LC alignment changes. For LC cells fabricated with an azobenzene-substituted calix[4]resorcinarene as a photoreactive molecule, a response time of 〜3 seconds was observed by a transmission ellipsometry. Hence, a quick response quicker than 2 ms was observed for a totat-reflection ellipsometry. The delay of the response in the bulk region reflects the propagation of LC alignment changes from the interface to the bulk.
日本液晶学会の論文
1998-10-12