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Anchoring and gliding of easy axis of 5CB on photoaligning PVCN‐F surface
Author(s) -
Buluy O.,
Iljin A.,
Ouskova E.,
Reznikov Yu.,
Blanc C.,
Nobili M.,
Antonova K.
Publication year - 2006
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.2235686
Subject(s) - anchoring , azimuth , orientation (vector space) , liquid crystal , physics , optics , cardinal direction , geometry , psychology , astronomy , social psychology , mathematics
— The photoaligning properties of the popular photoaligning material polyvinyl‐4(fluorocinnamate) (PVCN‐F) are presented. The aligning quality and azimuthal and zenithal anchoring energy were measured and the drift of the easy orientation axis (gliding effect) on the PVCN‐F surface, depending on UV exposure, was studied. Special attention is paid to unraveling the contribution of the adsorption liquid‐crystal molecules onto the aligning surface to the anchoring properties of PVCNF and measuring the drift of the easy orientation axis over the PVCN‐F surface. It is shown that a relatively weak azimuthal anchoring energy (W az ∼ 10 −7 − 10 −5 J/m 2 ) leads to strong drift of the easy axis in the azimuthal plane that was observed in a moderate (∼0.1–0.3 T) magnetic field. A much stronger polar anchoring (W zen ∼ 10 −4 J/m 2 ) allowed us to observe the essential gliding of the easy axis in the zenithal plane in a rather strong electric field (∼5 V/μm).