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Published in:
2006 | OriginalPaper | Chapter
Long Range Particle Transport in Liquid Crystal-alkane Mixtures
Authors : Beate Ullrich, Ewa Ilska, Norbert Höhn, Doris Vollmer
Published in: Smart Colloidal Materials
Publisher: Springer Berlin Heidelberg
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Microscopic tracking of silica tracer particles suspended in mixtures of a nematogen (5CB) and small amounts of alkane reveals that during an isotropic-nematic phase transition induced by slow cooling particle transport is dominated by long-range interaction with the isotropic-nematic interface for the most part of phase transition. According to the phase diagram of liquid crystal-alkane mixtures, this long-range interaction was attributed to hydrodynamic (advection) or thermodynamic (local concentration gradients) effects of alkane redistribution from the nematic into the isotropic domains during phase transformation.