Homogeneous liquid crystal alignment on inorganic-organic hybrid silica thin films derived by the sol-gel method

Soo Sang Chae, Byoung Har Hwang, Woo Soon Jang, Jin Young Oh, Jee Ho Park, Se Jong Lee, Kie Moon Song, Hong Koo Baik

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We developed an inorganic-organic hybrid thin film via the sol-gel method for a new liquid crystal alignment layer and investigated the influence of an organic species on the alignment characteristics of the liquid crystals (LCs). A thin film of methyl-doped amorphous silicon oxide (a-SiO x:CH 3) was fabricated from the hydrolysis and condensation reaction of the initial precursors of methyltriethoxysilane (MTES) and tetraethoxysilane (TEOS) at a proper ratio. A low-energy ion beam (IB) treatment gives rise to the homogeneous alignment of LC in an IB condition on a-SiO x:CH 3 thin film; however, it is difficult to control the LC alignment on a-SiO x thin film derived only from TEOS as a precursor. The LC alignment depending on the chemical structure of the silica thin film was investigated and analyzed in terms of the sensitivity of the axis-selective destruction of the chemical bonding on the surface of the thin silica film.

Original languageEnglish
Pages (from-to)1437-1442
Number of pages6
JournalSoft Matter
Volume8
Issue number5
DOIs
Publication statusPublished - 2012 Feb 7

Fingerprint

Liquid Crystals
Silicon Dioxide
Sol-gel process
liquid crystals
alignment
gels
silicon dioxide
Thin films
thin films
Ion beams
ion beams
methylidyne
Condensation reactions
Silicon oxides
Amorphous silicon
silicon oxides
destruction
amorphous silicon
hydrolysis
Hydrolysis

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Chae, Soo Sang ; Hwang, Byoung Har ; Jang, Woo Soon ; Oh, Jin Young ; Park, Jee Ho ; Lee, Se Jong ; Song, Kie Moon ; Baik, Hong Koo. / Homogeneous liquid crystal alignment on inorganic-organic hybrid silica thin films derived by the sol-gel method. In: Soft Matter. 2012 ; Vol. 8, No. 5. pp. 1437-1442.
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Homogeneous liquid crystal alignment on inorganic-organic hybrid silica thin films derived by the sol-gel method. / Chae, Soo Sang; Hwang, Byoung Har; Jang, Woo Soon; Oh, Jin Young; Park, Jee Ho; Lee, Se Jong; Song, Kie Moon; Baik, Hong Koo.

In: Soft Matter, Vol. 8, No. 5, 07.02.2012, p. 1437-1442.

Research output: Contribution to journalArticle

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AU - Hwang, Byoung Har

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AU - Lee, Se Jong

AU - Song, Kie Moon

AU - Baik, Hong Koo

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