laboratoire de physique statistique
 
 
laboratoire de physique statistique

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ADVANCES IN COLLOID AND INTERFACE SCIENCE 


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P U B L I C A T I O N S



 
2011
Experimental study of hybrid nematic wetting films - Cazabat, A. M. and Delabre, U. and Richard, C. and Sang, Y. Yip Cheung
ADVANCES IN COLLOID AND INTERFACE SCIENCE 16829-39 (2011)

Abstract : Liquid crystal layers, with thickness less than 1 mu m, are deposited on isotropic - solid or liquid - substrates and investigated in the bulk nematic range of temperatures. The boundary conditions at interfaces are antagonist ones, therefore the layers are distorted due to nematic elasticity. These films are referred to as ``hybrid nematics''. The consequences are complex. First, a forbidden range of film thickness is observed, depending only on temperature. Second, the anisotropy of the elastic response gives rise to striking stripe patterns in the thicker films. This behavior is common to several members of the series of n-cyanobiphenyls deposited on oxidized silicon wafers, water and glycerol. The aim of the study is to collect data, and determine which ones find a place within a common theoretical framework. (C) 2011 Elsevier B.V. All rights reserved.