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Entropic wetting and the fluid-fluid interface of a
model colloid-polymer mixture J. M. Brader, R. Evans, M. Schmidt, and H. Löwen, J. Phys. Condens. Matter 14, L1 (2002). Locate in [bare] [illustrated] list. Get [full paper] as pdf. Extract. A recent density functional theory is used to investigate the free interface between demixed fluid phases in a model colloid-polymer mixture. Results for the surface tension are in reasonable agreement with experiment. When the mixture is adsorbed against a hard wall, entropic depletion effects give rise to a wetting transition whereby the colloid-rich phase wets completely. [more]  Read the [full paper] as pdf. |
Fluid interfaces
Colloid-polymer mixtures display fluid-fluid interfaces [21] [44], relevant for laser-induced condensation [35], capillary condensation [43] and evaporation [48], immersion in porous media [41], the appearance of the floating liquid phase [52], the competition between sedimentation and phase coexistence [51], tension at a substrate [45], the experimental observation of thermal capillary waves [47], and the contact angle of the liquid-gas interface and a wall [50]. In colloidal rod-sphere mixtures fluid-fluid interfaces were investigated with theory [30] and simulation [42]. Hard sphere fluids were considered at surfaces of porous media [37], in random fiber networks [39], and in one dimensional cases [46].[more]