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Pattern formation during mesophase growth in a homologous series
Tóth Katona, T.; Börzsönyi, T.; Váradi, Z.; Szabon, J.; Buka, A.; González Cinca, Ricardo; Ramírez de la Piscina Millán, Laureano; Casademunt, Jaume; Hernández-Machado, Aurora
Universitat Politècnica de Catalunya. Departament de Física Aplicada
Remarkable differences in the shape of the nematic-smectic-B interface in a quasi-two-dimensional geometry have been experimentally observed in three liquid crystals of very similar molecular structure, i.e., neighboring members of a homologous series. In the thermal equilibrium of the two mesophases a faceted rectanglelike shape was observed with considerably different shape anisotropies for the three homologs. Various morphologies such as dendritic, dendriticlike, and faceted shapes of the rapidly growing smectic-B germ were also observed for the three substances. Experimental results were compared with computer simulations based on the phase field model. The pattern forming behavior of a binary mixture of two homologs was also studied.
Peer Reviewed
Àrees temàtiques de la UPC::Física::Termodinàmica::Física estadística
Equations of state
Phase transformations (Statistical physics)
Liquid crystals
Facets
Dendrites
Phase-field models
Solidification
Equacions d'estat
Transformacions de fase (Física estadística)
info:eu-repo/semantics/publishedVersion
Article
American Physical Society
         

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