標題: Controllable alignment modes of nematic liquid crystals on argon ion beam bombarded polyimide films
作者: Wu, Hsin-Ying
Wang, Chih-Chieh
Pan, Ru-Pin
Tang, Tsung-Ta
Chang, Shao-Ju
Hwang, Jenn-Chang
材料科學與工程學系
電子物理學系
光電工程學系
Department of Materials Science and Engineering
Department of Electrophysics
Department of Photonics
關鍵字: ion beam;nematic liquid crystals;polyimide films;pretilt angle;surface alignments
公開日期: 2007
摘要: We investigate the alignment properties of nematic liquid crystal on polyimide films bombarded by Ar ion beams with a small diode sputter type ion-beam source. The alignments of nematic liquid crystal 4'-n-pentyl-4-cyanobiphenyl (5CB) on treated polyimide surface are characterized by using polarizing optical microscope and conoscope. The polyimide surfaces are also studied by using atomic force microscope and x-ray photoemission spectroscopy. We have demonstrated that the polyimide surface treated by Ar ion beams can give both homogeneous and homeotropic alignments with the same ion beam apparatus but varying the energy of ion beam and the bombarding time.
URI: http://hdl.handle.net/11536/5501
http://dx.doi.org/10.1080/15421400701681612
ISSN: 1542-1406
DOI: 10.1080/15421400701681612
期刊: MOLECULAR CRYSTALS AND LIQUID CRYSTALS
Volume: 475
起始頁: 45
結束頁: 55
Appears in Collections:Conferences Paper


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