Colloidal crystal formation via polymer-liquid-crystal demixingS. K. Das and A. D. Rey
Department of Chemical Engineering, McGill University 3610 University St., Montreal, QC H3A 2B2, Canada
received 24 January 2005; accepted in final form 18 April 2005
published online 4 May 2005
Simulations of the formation and structure of colloidal crystal ordering that emerge from phase-separation-phase-ordering-texture processes driven by thermal quenches of an isotropic phase of polymer-rigid-rod mesogens are presented and characterized using spinodal-decomposition measures and liquid-crystal defect physics. The positional order in the crystalline emulsion emerges from orientation-driven spinodal decomposition, and the polymer droplet lattice is pinned by a random network of disclination lines embedded in the nematic-liquid-crystalline matrix. The nematic texture is controlled by the coupling between diffusion and nematic ordering.
61.46.+w - Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals.
77.84.Nh - Liquids, emulsions, and suspensions; liquid crystals.
81.30.-t - Phase diagrams and microstructures developed by solidification and solid-solid phase transformations.
© EDP Sciences 2005