Control of surface anchoring properties of liquid crystal by thermo-transfer printing of siloxane oligomers

Jeng Hun Suh; Jiyoon Kim; Yong Sang Ryu; Youngjoo Sohn; Sin Doo Lee

doi:10.1080/02678292.2015.1036470

Control of surface anchoring properties of liquid crystal by thermo-transfer printing of siloxane oligomers

Jeng Hun Suh, Jiyoon Kim, Yong Sang Ryu, Youngjoo Sohn, Sin Doo Lee

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

We presented the results for the surface anchoring properties of a nematic liquid crystal (LC) in a wide range of the substrate wettability through thermo-transfer printing of siloxane oligomers. For the modification of the surface energy, poly(dimethylsiloxane) (PDMS) oligomers were directly transferred onto a glass substrate from a bulk PDMS plate by contact printing at elevated temperatures. The hydrophobicity of the PDMS-modified surface was found to increase with the temperature of the substrate during transfer printing. The LC alignment on the PDMS-modified substrate exhibited continuous variations of the pretilt angle from nearly 0° to 90° and the polar anchoring strength according to the surface energy.

Original language	English (US)
Pages (from-to)	1236-1242
Number of pages	7
Journal	Liquid Crystals
Volume	42
Issue number	9
DOIs	https://doi.org/10.1080/02678292.2015.1036470
State	Published - Sep 2 2015

Keywords

liquid crystal alignment
poly(dimethylsiloxane)
pretilt angle
thermo-transfer printing

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10.1080/02678292.2015.1036470

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title = "Control of surface anchoring properties of liquid crystal by thermo-transfer printing of siloxane oligomers",

abstract = "We presented the results for the surface anchoring properties of a nematic liquid crystal (LC) in a wide range of the substrate wettability through thermo-transfer printing of siloxane oligomers. For the modification of the surface energy, poly(dimethylsiloxane) (PDMS) oligomers were directly transferred onto a glass substrate from a bulk PDMS plate by contact printing at elevated temperatures. The hydrophobicity of the PDMS-modified surface was found to increase with the temperature of the substrate during transfer printing. The LC alignment on the PDMS-modified substrate exhibited continuous variations of the pretilt angle from nearly 0° to 90° and the polar anchoring strength according to the surface energy.",

keywords = "liquid crystal alignment, poly(dimethylsiloxane), pretilt angle, thermo-transfer printing",

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AU - Suh, Jeng Hun

AU - Kim, Jiyoon

AU - Ryu, Yong Sang

AU - Sohn, Youngjoo

AU - Lee, Sin Doo

PY - 2015/9/2

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N2 - We presented the results for the surface anchoring properties of a nematic liquid crystal (LC) in a wide range of the substrate wettability through thermo-transfer printing of siloxane oligomers. For the modification of the surface energy, poly(dimethylsiloxane) (PDMS) oligomers were directly transferred onto a glass substrate from a bulk PDMS plate by contact printing at elevated temperatures. The hydrophobicity of the PDMS-modified surface was found to increase with the temperature of the substrate during transfer printing. The LC alignment on the PDMS-modified substrate exhibited continuous variations of the pretilt angle from nearly 0° to 90° and the polar anchoring strength according to the surface energy.

AB - We presented the results for the surface anchoring properties of a nematic liquid crystal (LC) in a wide range of the substrate wettability through thermo-transfer printing of siloxane oligomers. For the modification of the surface energy, poly(dimethylsiloxane) (PDMS) oligomers were directly transferred onto a glass substrate from a bulk PDMS plate by contact printing at elevated temperatures. The hydrophobicity of the PDMS-modified surface was found to increase with the temperature of the substrate during transfer printing. The LC alignment on the PDMS-modified substrate exhibited continuous variations of the pretilt angle from nearly 0° to 90° and the polar anchoring strength according to the surface energy.

KW - liquid crystal alignment

KW - poly(dimethylsiloxane)

KW - pretilt angle

KW - thermo-transfer printing

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Control of surface anchoring properties of liquid crystal by thermo-transfer printing of siloxane oligomers

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