Compositional investigation of liquid crystal alignment on tantalum oxide via ion beam irradiation

Jong Yeon Kim, Byeong Yun Oh, Byoung Yong Kim, Young Hwan Kim, Jin Woo Han, Jeong Min Han, Dae-Shik Seo

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The homogeneously aligned liquid crystal display on Ta2 O5 via ion beam (IB) irradiation was first embodied with controllability of pretilt angle depending on incident angle of the IB. As a result of x-ray photoelectron spectroscopic analysis, the intensity of Ta-O and O-Ta bondings as a function of incident angle behaved reversely with the pretilt angle and the lowest amplitude was observed at 45°. It revealed that the creation of pretilt angle was attributed to the irradiation of the IB by breaking Ta-O and O-Ta bonding so orientational order was generated by directional IB. Comparable electro-optical characteristics to rubbed polyimide were also achieved.

Original languageEnglish
Article number043505
JournalApplied Physics Letters
Issue number4
Publication statusPublished - 2008 Feb 8


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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