Alignment of liquid crystals on a photosensitive substrate studied by surface optical second-harmonic generation

作     者：I. Drevenšek Olenik M. W. Kim A. Rastegar Th. Rasing 

作者机构：Faculty of Mathematics and Physics University of Ljubljana Jadranska 19 SI 1000 Ljubljana SloveniaJ. Stefan’ Institute Jamova 39 SI 1001 Ljubljana Slovenia Research Institute for Materials University of Nijmegen Toernooiveld 1 6525 ED Nijmegen The Netherlands Department of Advanced Materials Engineering Korea Advanced Institute of Science and Technology Seoul Korea Nijmegen SON Research Institute for Molecular Structures Design and Synthesis University of Nijmegen Toernooiveld 1 6525 ED Nijmegen The Netherlands 

出 版 物：《Physical Review E》 (Phys Rev E.)

年 卷 期：2000年第61卷第4期

页      面：R3310(R)-R3310(R)页

核心收录：

摘      要：The adsorption kinetics and orientational ordering of 4′−n−octyl−4-cyanobiphenyl (8CB) liquid crystal films evaporated onto photosensitive poly(vinyl-cinnamate) (PVCN) substrates were investigated by surface optical second-harmonic generation. The adsorption rate of the first monolayer decreases with increasing degree of photochemical modification of the polymer. The in-plane orientational anisotropy of the 8CB films grown on unidirectionally photopolymerized PVCN substrates is considerably lower than the intrinsic surface orientational anisotropy of these substrates, which can explain the generally found weak surface anchoring of liquid crystals on PVCN alignment layers.