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Article
Homeotropically Aligning Phase Separated Columnar Structures For Fabrication of Flexible Electrooptical Devices
Applied Physics Letters
  • Bharat R. Acharya, Kent State University - Kent Campus
  • Hyunchul Choi, Kent State University - Kent Campus
  • Mohan Srinivasarao
  • Satyendra Kumar, Kent State University - Kent Campus
Publication Date
11-28-2011
Document Type
Article
DOI
10.1063/1.3663966
Keywords
  • Composite Films,
  • Liquid Crystals,
  • Alignment,
  • Displays
Disciplines
Abstract
A method of achieving homeotropic alignment of liquid crystals (LCs) by ultraviolet light induced phase separation of LC from its mixture with photo-curable pre-polymer is reported. Vertical polymer columns and micro-fibrils developed during the phase separation promote homeotropic alignment of the LC director (i.e., alignment perpendicular to the LC-substrate interface), suitable for devices based on LCs possessing negative dielectric anisotropy. These vertical structures extend between two substrates and permit the fabrication of highly flexible electro-optical devices with high contrast coupled with fast response times. This simple single-step technique eliminates the need for the traditional polymer alignment layer pre-deposited on substrates. (C) 2011 American Institute of Physics. [doi:10.1063/1.3663966]
Comments

Copyright 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Appl. Phys. Lett. 99, 221108 (2011); and may be found at http://dx.doi.org/10.1063/1.3663966.

Citation Information
Bharat R. Acharya, Hyunchul Choi, Mohan Srinivasarao and Satyendra Kumar. "Homeotropically Aligning Phase Separated Columnar Structures For Fabrication of Flexible Electrooptical Devices" Applied Physics Letters Vol. 99 Iss. 22 (2011)
Available at: http://works.bepress.com/satyendra_kumar/12/