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

Research output: Contribution to journalArticlepeer-review

6 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 languageEnglish (US)
Pages (from-to)1236-1242
Number of pages7
JournalLiquid Crystals
Volume42
Issue number9
DOIs
StatePublished - Sep 2 2015

Keywords

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

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