Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2008-02-18
Physics
Condensed Matter
Soft Condensed Matter
preprint, 32 pages, 6 figures, 3 tables, J. Chem. Phys. in press
Scientific paper
10.1063/1.2888997
We report theoretical and numerical evaluations of the phase diagram for a model of patchy particles. Specifically we study hard-spheres whose surface is decorated by a small number f of identical sites ("sticky spots'') interacting via a short-range square-well attraction. We theoretically evaluate, solving the Wertheim theory, the location of the critical point and the gas-liquid coexistence line for several values of f and compare them to results of Gibbs and Grand Canonical Monte Carlo simulations. We study both ordered and disordered arrangements of the sites on the hard-sphere surface and confirm that patchiness has a strong effect on the phase diagram: the gas-liquid coexistence region in the temperature-density plane is significantly reduced as f decreases. We also theoretically evaluate the locus of specific heat maxima and the percolation line.
Bianchi Emanuela
Sciortino Francesco
Tartaglia Piero
Zaccarelli Emanuela
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