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25. |
Colloids, polymers, and needles: Demixing phase behavior M. Schmidt and A. R. Denton, Phys. Rev. E 65, 021508 (2002). Locate in [bare] [illustrated] list. Get [full paper] as pdf. Abstract. We consider a ternary mixture of hard colloidal spheres, ideal polymer spheres, and rigid vanishingly thin needles, which model stretched polymers or colloidal rods. For this model, we develop a geometry-based density functional theory, apply it to bulk fluid phases, and predict demixing phase behavior. In the case of no polymer-needle interactions, two-phase coexistence between colloid-rich and colloid-poor phases is found. For hard needle-polymer interactions, we predict rich phase diagrams, exhibiting three-phase coexistence, and reentrant demixing behavior. [figures] Read the [full paper] as pdf. |