Liquid-gas separation in colloidal electrolytes

Details Liquid-gas separation in colloidal electrolytes Liquid-gas separation in colloidal electrolytes

2005-08-10

arxiv.org/abs/cond-mat/0508259v2

Physics

Condensed Matter

Soft Condensed Matter

6 pages

Scientific paper

10.1063/1.2159481

The liquid-gas transition of an electroneutral mixture of oppositely charged colloids, studied by Monte Carlo simulations, is found in the low temperature -- low density region. The critical temperature shows a non-monotonous behavior as a function of the interaction range, $\kappa^{-1}$, with a maximum at $\kappa \sigma \approx 10$, implying an island of coexistence in the $\kappa$-$\rho$ plane. The system is arranged in such a way that each particle is surrounded by shells of particles with alternating charge. In contrast with the electrolyte primitive model, both neutral and charged clusters are obtained in the vapor phase

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