UV-driven in-plane rotation of a liquid crystal director in poly(vinyl cinnaniate) films having microscale grooves

Dowon Ahn, Yong Cheol Jeong, Seungwoo Lee, Jung Ki Park

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The micropatterned poly(vinyl cinnamate) (PVCi) alignment layers are fabricated by a solvent-assisted micromolding method. Without UV irradiation, the alignment layer can induce the unidirectional liquid crystal (LC) orientation, which is influenced by topography-based anchoring energies. With photodimerization of PVCi by UV irradiation, we could modulate the anchoring energies caused by chemical interactions of the alignment layer. It is observed that these two different contributions compete against each other in determining LC rotation on the surface of the alignment layer. The rotation angle of LC directors could be controlled from 45° to 70° by simply changing the UV exposure dose.

Original languageEnglish
Pages (from-to)3141-3143
Number of pages3
JournalOptics Letters
Volume35
Issue number18
DOIs
Publication statusPublished - 2010 Sep 16

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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