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

doi:10.1364/OL.35.003141

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

KU-KIST Graduate School of Converging Science and Technology

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	3141-3143
Number of pages	3
Journal	Optics Letters
Volume	35
Issue number	18
DOIs	https://doi.org/10.1364/OL.35.003141
Publication status	Published - 2010 Sept 16

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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

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.",

author = "Dowon Ahn and Jeong, {Yong Cheol} and Seungwoo Lee and Park, {Jung Ki}",

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AU - Ahn, Dowon

AU - Jeong, Yong Cheol

AU - Lee, Seungwoo

AU - Park, Jung Ki

PY - 2010/9/16

Y1 - 2010/9/16

N2 - 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.

AB - 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.

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SN - 0146-9592

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JO - Optics Letters

JF - Optics Letters

IS - 18

ER -

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

Abstract

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