Collapse of Homeotropic Liquid-Crystal Alignment by Increased Molecular Packing on Comb-Like Polymer Surfaces

ChemPhysChem ◽  
2012 ◽  
Vol 13 (8) ◽  
pp. 2061-2067 ◽  
Author(s):  
Eun-Ho Sohn ◽  
Hyo Kang ◽  
Dong-Gyun Kim ◽  
Kigook Song ◽  
Jong-Chan Lee
Keyword(s):  
Liquid Crystal ◽  
Molecular Packing ◽  
Polymer Surfaces ◽  
Liquid Crystal Alignment ◽  
Crystal Alignment

scholarly journals Regularity and Narrowness of the Intervals of the Microgrooves on the Rubbed Polymer Surfaces for Liquid Crystal Alignment

1995 ◽  
Vol 27 (3) ◽  
pp. 240-246 ◽  
Author(s):  
Takashi Ito ◽  
Kazuo Nakanishi ◽  
Michinori Nishikawa ◽  
Yasuaki Yokoyama ◽  
Yasumasa Takeuchi
Keyword(s):  
Liquid Crystal ◽  
Polymer Surfaces ◽  
Liquid Crystal Alignment ◽  
Crystal Alignment

Mechanisms Of Liquid Crystal Alignment On Buffed Polyimide Surfaces

1994 ◽  
Vol 345 ◽  
Author(s):  
Hirotsugu Kikuchi ◽  
J. A. Logan ◽  
Do Y. Yoon
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Amic Acid ◽  
Polymer Chains ◽  
Polymer Surfaces ◽  
Polyimide Films ◽  
Force Microscopy ◽  
Liquid Crystal Alignment ◽  
Smectic C ◽  
Crystal Alignment

AbstractThe surfaces of poly(amic acid) and cured polyimide films, subjected to different buffing and cure profiles, have been examined by atomic force microscopy (AFM). The ability of these buffed polymer surfaces to align nematic and chiral smectic C liquid crystals were also investigated. These studies show that the presence of microgrooves on buffed polymer surfaces are not necessary for alignment of liquid crystals. Rather, it is concluded that the liquid crystal alignment is mainly caused by the anisotropic intermolecular interactions between liquid crystal molecules and the polymer chains oriented by buffing. For the alignment of smectics, both the degree of order and mechanical properties of polyimide films are found to be important factors.

Microscopic Origin of Liquid Crystal Alignment on Rubbed Polymer Surfaces

1998 ◽  
Vol 31 (6) ◽  
pp. 1942-1946 ◽  
Author(s):  
J. Stöhr ◽  
M. G. Samant ◽  
A. Cossy-Favre ◽  
J. Díaz ◽  
Y. Momoi ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polymer Surfaces ◽  
Liquid Crystal Alignment ◽  
Crystal Alignment ◽  
Microscopic Origin

Bistable liquid crystal device fabricated via microscale liquid crystal alignment

2016 ◽  
Vol 120 (14) ◽  
pp. 143105 ◽  
Author(s):  
Michinori Honma ◽  
Wataru Toyoshima ◽  
Toshiaki Nose
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystal Device ◽  
Liquid Crystal Alignment ◽  
Crystal Alignment

Soft imprint lithography for liquid crystal alignment using a wrinkled UVO-treated PDMS transferring method

2021 ◽  
Vol 323 ◽  
pp. 115150
Author(s):  
Jung-Hyun Hwang ◽  
Jae-Sung Hong ◽  
Chan-Woo Oh ◽  
Min-Je Joe ◽  
Hae-Chang Jeong ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Imprint Lithography ◽  
Liquid Crystal Alignment ◽  
Crystal Alignment

Liquid Crystal Alignment on Polymer Films:Changes of the Pretilt Angles Due to the Thermal Treatment of Polyalkylene Pyromellitimides

1993 ◽  
Vol 32 (Part 1, No. 11A) ◽  
pp. 5052-5058 ◽  
Author(s):  
Bernt O. Myrvold ◽  
Yasushi Iwakabe ◽  
Shuichi Oh-hara ◽  
Katsumi Kondo
Keyword(s):  
Liquid Crystal ◽  
Thermal Treatment ◽  
Liquid Crystal Alignment ◽  
Crystal Alignment ◽  
Pretilt Angles
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