標題: Surface Alignment with High Pretilt Angle Using the Photoreactive Fluorinated Polymer Films
作者: Wu, Hsin-Ying
Wang, Chih-Yu
Lin, Chia-Jen
Pan, Ru-Pin
Lin, Song-Shiang
Lee, Chein-Dhau
Kou, Chwung-Shan
電子物理學系
Department of Electrophysics
關鍵字: fluorinated polymer films;ion beam;nematic liquid crystals;pretilt angle;surface alignments;ultraviolet irradiation
公開日期: 2009
摘要: A newly developed fluorinated polymer film for liquid crystal alignment by applying ultra-violet (UV) irradiation or ion beam treatment is studied in this work. The surface alignment with high pretilt angle is achieved by the UV treatment. The induced pretilt angle by ion beam treatment on this photo-reactive polymer film, however, is relatively small. Surface analyses by x-ray photoemission spectroscopy and contact angle measurement are carried out to deduce the underlying mechanism. The result shows that the higher content of the fluorinated side-chain in polymer contribute to the lower surface energy and the higher pretilt angle. The atomic ratio of fluorine is largely decreased by ion beam treatments. The alignment uniformity and stability of the surfaces treated by linearly-polarized UV light and ion beam bombardment are also demonstrated.
URI: http://hdl.handle.net/11536/15917
http://dx.doi.org/10.1080/15421400903053990
ISSN: 1542-1406
DOI: 10.1080/15421400903053990
期刊: MOLECULAR CRYSTALS AND LIQUID CRYSTALS
Volume: 507
起始頁: 290
結束頁: 300
Appears in Collections:Conferences Paper


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