%0 Journal Article
%T Anchoring and gliding of easy axis of 5CB on photoaligning PVCN-F surface
%+ Institute of Physics of NAS of Ukraine
%+ Laboratoire des colloïdes, verres et nanomatériaux (LCVN)
%+ Institut of the Solid State Physics (ISSP)
%A Buluy, O.
%A Iljin, A.
%A Ouskova, E.
%A Reznikov, Yu.
%A Blanc, Christophe
%A Nobili, Maurizio
%A Antonova, K.
%< avec comité de lecture
%@ 1071-0922
%J Journal of the Society for Information Display
%I Society for Information Display(AIP)
%V 14
%N 7
%P 603
%8 2006
%D 2006
%R 10.1889/1.2235686
%K liquid crystals
%K nematic
%K anchoring
%Z Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]Journal articles
%X Abstract— 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 (Waz ∼ 10−7 − 10−5 J/m2) 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 (Wzen ∼ 10−4 J/m2) allowed us to observe the essential gliding of the easy axis in the zenithal plane in a rather strong electric field (∼5 V/μm).
%G English
%L hal-01208122
%U https://hal.science/hal-01208122
%~ CNRS
%~ UNIV-MONTP2
%~ LCVN
%~ UNIV-MONTPELLIER
%~ UM1-UM2