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Jpn. J. Appl. Phys. 46 (2007) pp. 3521-3523  |Previous Article| |Next Article|  |Table of Contents|
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Brief Communication

Various Liquid Crystal Alignments on Fluorinated Diamond-Like Carbon Layer by Ion Beam Treatment

Han Jin Ahn, Kyung Chan Kim, Jong Bok Kim, and Byoung Har Hwang

Department of Metallurgical Science and Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-ku, Seoul 120-749, Korea

(Received December 15, 2006; accepted March 15, 2007; published online June 6, 2007)

Fluorinated diamond-like carbon (FDLC) thin films with various wetting properties were introduced as liquid crystal (LC) alignment layers. We applied the ion beam (IB) treatment as an LC alignment method. Although the carbon-rich FDLC favored parallel LC orientation, the fluorine-rich FDLC favored vertical or tilted vertical orientation. Microscopic mechanisms of different orientations are discussed and insight into the role of fluorine and carbon binding is discussed.

URL: http://jjap.jsap.jp/link?JJAP/46/3521/
DOI: 10.1143/JJAP.46.3521
KEYWORDS:liquid crystal, alignment layer, hydrophobic, fluorinated diamond-like carbon

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