Abstract

The low-density phase diagrams of charge-stabilized colloidal suspensions of theDerjaguin–Landau–Verwey–Overbeek theory with an approximate effective one-componentHamiltonian given by the volume term and effective pair interactions, and of the classicaltheory (without including the volume term), are obtained from the hypernetted-chainintegral equation at low colloidal charges. In the salt-free case both phase diagrams exhibita vapour–liquid transition with short-ranged colloid–colloid correlations. This phaseseparation is compared to the vapour–liquid transition found in binary mixtures of highlyasymmetrical hard spheres.

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