Spreading of nematic liquid crystals on hydrophobic substrates
作者： C. Poulard , M. Voué , J. De Coninck , A.M. Cazabat
DOI: 10.1016/J.COLSURFA.2005.10.022
关键词: Wetting 、 Ellipsometry 、 Materials science 、 Hydrophobic silica 、 Chromatography 、 Mesoscopic physics 、 Macroscopic scale 、 Liquid crystal 、 Microscopic scale 、 Chemical physics 、 Elastic energy
摘要: Abstract The spontaneous spreading of nematic liquid crystals on hydrophobic silica substrates has been investigated at various scales by combining ellipsometry, profilometry and interferometry. While anchoring defects play a major role hydrophilic the macroscopic scale, making behaviour films highly complex, they do not show up these substrates. Then, main specificity is elastic energy associated to long-range orientational order. Experiment shows that laws differ from ones simple wetting liquids. Moreover, microscopic sharp transition between mesoscopic, film, molecularly thin precursor, observed. length precursor as inverse velocity, expected for adiabatic films.
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