Control of liquid crystal pretilt angles by using organic/inorganic hybrid interpenetrating networks

Dowon Ahn, Yong Cheol Jeong, Seungwoo Lee, Jihye Lee, Yongjoon Heo, Jung Ki Park

Research output: Contribution to journalArticle

24 Citations (Scopus)


A new photoalignment method of controlling the pretilt angle of liquid crystals (LCs) by using organic/inorganic hybrid interpenetrating polymer networks (IPNs) is proposed and demonstrated. In the hybrid IPN alignment layer system, the competition between polyvinyl cinnamate) (PVCi) favoring planar alignment and poly(dimethyl siloxane) (PDMS) favoring vertical alignment made it possible to achieve pretilt angle in a wide range from 0° to 90°, and adjust pretilt angle as a function of PDMS content. In addition, we achieved the high azimuthal anchoring energy at the intermediate pretilt angle by using PDMS as the vertical-aligning component.

Original languageEnglish
Pages (from-to)16603-16612
Number of pages10
JournalOptics Express
Issue number19
Publication statusPublished - 2009 Sep 14


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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