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

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5 Citations (Scopus)


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
Issue number1
Publication statusPublished - 2012 Jan 1


All Science Journal Classification (ASJC) codes

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

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