Measurement with a rotating magnetic field of the surface viscosity of a nematic liquid crystal
Université de Lyon, Ecole Normale Supérieure de Lyon, Laboratoire de Physique, UMR 5672 of the CNRS 46 Allée d'Italie, 69364 Lyon Cedex 07, France, EU
Received: 31 August 2012
Accepted: 27 September 2012
We show how to measure with a rotating magnetic field the surface viscosity of a nematic liquid crystal in contact with a thin polymercaptan layer allowing for a planar sliding anchoring of the molecules.
PACS: 61.30.Hn – Surface phenomena: alignment, anchoring, anchoring transitions, surface-induced layering, surface-induced ordering, wetting, prewetting transitions, and wetting transitions / 83.80.Xz – Liquid crystals: nematic, cholesteric, smectic, discotic, etc. / 66.20.Ej – Studies of viscosity and rheological properties of specific liquids
© EPLA, 2012