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, Hyung Jun Kim, Hae Yoon Jung, Dae Shik Seo

Research output: Contribution to journalArticlepeer-review

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

Bibliographical note

Funding Information:
This research was supported by the MKE (The Ministry of Knowledge Economy), Korea, under the ITRC (Information Technology Research Center) support program supervised by the NIPA (National IT Industry Promotion Agency) (NIPA-2011-C1090-1111-0002)

All Science Journal Classification (ASJC) codes

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

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