Multiphase coexistence in polydisperse colloidal mixtures

Details Multiphase coexistence in polydisperse colloidal mixtures Multiphase coexistence in polydisperse colloidal mixtures

2006-08-02

arxiv.org/abs/cond-mat/0608051v2

Physics

Condensed Matter

Soft Condensed Matter

10 pages, 4 figures

Scientific paper

10.1063/1.2430524

We study the phase behavior of mixtures of monodisperse colloidal spheres with a depletion agent which can have arbitrary shape and can possess a polydisperse size or shape distribution. In the low concentration limit, considered here, we can employ the free-volume theory and take the geometry of particles of the depletion agent into account within the framework of fundamental measure theory. We apply our approach to study the phase diagram of a mixture of (monodisperse) colloidal spheres and two polydisperse polymer components. By fine tuning the distribution of the polymer it is possible to construct a complex phase diagram which exhibits two stable critical points.

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