Oxidation state investigation concerning liquid crystal alignment on polydimethylsiloxane layer by ion beam irradiation

Seok Yang, Jong Jin Lee, Hee Jun Lee, Young Gu Kang, Hyungjun Kim, Hae Yoon Jung, Dae-Shik Seo

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This is a study of ion beam (IB)-irradiated polydimethylsiloxane (PDMS) layer-induced liquid crystal (LC) effects and electro-optical (EO) properties with varying IB incident angles. Depending on the incident angle, the homogeneously aligned LC on the PDMS layer via IB irradiation was embodied with LC alignment capability and performance. Based on X-ray photoelectron spectroscopic (XPS) analysis, the intensity of O-Si as a function of incident angle shows oxidation of the IB-treated PDMS surface. It revealed that van der Waals forces generated by delocalised electrons on the PDMS surface were attributed to LC alignment by selective destructions of the Si-C bonding in the direction of IB irradiation. EO characteristics comparable with rubbed polyimide were also achieved.

Original languageEnglish
Pages (from-to)71-75
Number of pages5
JournalLiquid Crystals
Volume39
Issue number1
DOIs
Publication statusPublished - 2012 Jan 1

Fingerprint

Liquid Crystals
Polydimethylsiloxane
Liquid crystals
Ion beams
ion beams
liquid crystals
alignment
Irradiation
Oxidation
oxidation
irradiation
Van der Waals forces
Spectroscopic analysis
spectroscopic analysis
Photoelectrons
polyimides
Polyimides
destruction
photoelectrons
Optical properties

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Yang, Seok ; Lee, Jong Jin ; Lee, Hee Jun ; Kang, Young Gu ; Kim, Hyungjun ; Jung, Hae Yoon ; Seo, Dae-Shik. / Oxidation state investigation concerning liquid crystal alignment on polydimethylsiloxane layer by ion beam irradiation. In: Liquid Crystals. 2012 ; Vol. 39, No. 1. pp. 71-75.
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Oxidation state investigation concerning liquid crystal alignment on polydimethylsiloxane layer by ion beam irradiation. / Yang, Seok; Lee, Jong Jin; Lee, Hee Jun; Kang, Young Gu; Kim, Hyungjun; Jung, Hae Yoon; Seo, Dae-Shik.

In: Liquid Crystals, Vol. 39, No. 1, 01.01.2012, p. 71-75.

Research output: Contribution to journalArticle

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AU - Yang, Seok

AU - Lee, Jong Jin

AU - Lee, Hee Jun

AU - Kang, Young Gu

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AU - Jung, Hae Yoon

AU - Seo, Dae-Shik

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AB - This is a study of ion beam (IB)-irradiated polydimethylsiloxane (PDMS) layer-induced liquid crystal (LC) effects and electro-optical (EO) properties with varying IB incident angles. Depending on the incident angle, the homogeneously aligned LC on the PDMS layer via IB irradiation was embodied with LC alignment capability and performance. Based on X-ray photoelectron spectroscopic (XPS) analysis, the intensity of O-Si as a function of incident angle shows oxidation of the IB-treated PDMS surface. It revealed that van der Waals forces generated by delocalised electrons on the PDMS surface were attributed to LC alignment by selective destructions of the Si-C bonding in the direction of IB irradiation. EO characteristics comparable with rubbed polyimide were also achieved.

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