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

Journal Article · Mon Jan 28 00:00:00 EST 2008 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2838312· OSTI ID:21016306

Kim, Jong-Yeon; Oh, Byeong-Yun; Kim, Byoung-Yong; Kim, Young-Hwan; Han, Jin-Woo; Han, Jeong-Min; Seo, Dae-Shik ^[1]

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1. Department of Electrical and Electronic Engineering, College of Engineering, Yonsei University, 134 Shinchon-dong, Seodaemoon-ku, Seoul 120-749 (Korea, Republic of)

The homogeneously aligned liquid crystal display on Ta{sub 2}O{sub 5} 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 deg. 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.

• OSTI ID: 21016306
• Journal Information: Applied Physics Letters, Vol. 92, Issue 4; Other Information: DOI: 10.1063/1.2838312; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL BONDS
ELECTRO-OPTICAL EFFECTS
ION BEAMS
IRRADIATION
LIQUID CRYSTALS
TANTALUM OXIDES
X-RAY PHOTOELECTRON SPECTROSCOPY