Open AccessPhotoreactive self-assembled monolayer for the stabilization of tilt orientation of a director in vertically aligned nematic liquid crystals
Author(s) -
Su Yeon Oh,
ShinWoong Kang
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.031367
Subject(s) - homeotropic alignment , liquid crystal , materials science , tilt (camera) , monolayer , optics , electric field , liquid crystal display , orientation (vector space) , polymerization , optoelectronics , nanotechnology , polymer , composite material , mechanical engineering , physics , quantum mechanics , engineering , geometry , mathematics
Photo-reactive self-assembled monolayer (PR-SAM) is employed to mediate alignment of liquid crystals (LC) and stabilize the tilt orientation of a nematic director for a vertically aligned liquid crystal. Bifunctional PR-SAM formed by silane coupling reaction to oxide surfaces efficiently induces a homeotropic alignment and stabilizes LC director by the photo-polymerization under applied electric field. As a result, the substantial enhancement of electro-optic performance has been achieved after the PR-SAM assisted stabilization of tilt orientation of director. This approach for pretilt stabilization has multifarious advantages over the conventional PSVA.