A method for the formation of polymer walls in liquid crystal/polymer mixtures
作者:
Yoan Kim,
Jim Francl,
Bahman Taheri,
John L. West,
期刊:
Applied Physics Letters
(AIP Available online 1998)
卷期:
Volume 72,
issue 18
页码: 2253-2255
ISSN:0003-6951
年代: 1998
DOI:10.1063/1.121333
出版商: AIP
数据来源: AIP
摘要:
We have investigated the formation of polymer walls for high polymer content liquid crystal (LC) formulations, using a patterned electric field to induce phase separation. The effect of this field on the phase separation temperature of a LC/monomer mixture is studied as a function of the photopolymerizable monomer concentration. The phase separation temperature increases with the patterned field strength. The application of a patterned field results in segregation of the LC molecules in the high electric field regions, i.e., pixels, whereas the monomers segregate in the low-field regions, i.e., interpixels. Subsequent photopolymerization results in the formation of polymer walls around the pixels. The structure of the polymer walls was investigated using scanning electron microscopy. ©1998 American Institute of Physics.
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