Surface tensions and anchoring transitions of nematic liquid crystals on gradually oxidized substrates
作者:
Pascal Hubert,
Yves Galerne,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 71,
issue 8
页码: 1050-1052
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.119724
出版商: AIP
数据来源: AIP
摘要:
Intermediate anchorings of nematic liquid crystals onto substrates are now intensively studied essentially because of their potential display applications. Here, we use the active oxygen gas arising from a plasma reactor to realize progressive chemical modifications of glass substrates covered with silane. In this manner, the dispersive and nondispersive surface tensions of the substrate are gradually modified involving a continuous change in the differential wetting properties of the substrate with both parts of the liquid crystal molecules, and in the anchoring energy. Intermediate anchorings with tilted angles are thus obtained in the vicinity of an anchoring transition from the pseudohomeotropic to the planar alignment, where symmetry is broken. ©1997 American Institute of Physics.
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