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Fantoni R, Gazzillo D, Giacometti A. Stability boundaries, percolation threshold, and two-phase coexistence for polydisperse fluids of adhesive colloidal particles. J Chem Phys. 2005;122(3):34901doi: 10.1063/1.1831275.
Fantoni, R., Gazzillo, D., & Giacometti, A. (2005). Stability boundaries, percolation threshold, and two-phase coexistence for polydisperse fluids of adhesive colloidal particles. The Journal of chemical physics, 122(3), 34901. https://doi.org/10.1063/1.1831275
Fantoni, Riccardo, et al. "Stability boundaries, percolation threshold, and two-phase coexistence for polydisperse fluids of adhesive colloidal particles." The Journal of chemical physics vol. 122,3 (2005): 34901. doi: https://doi.org/10.1063/1.1831275
Fantoni R, Gazzillo D, Giacometti A. Stability boundaries, percolation threshold, and two-phase coexistence for polydisperse fluids of adhesive colloidal particles. J Chem Phys. 2005 Jan 15;122(3):34901. doi: 10.1063/1.1831275. PMID: 15740221.
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J Chem Phys. 2005 Jan 15;122(3):34901. doi: 10.1063/1.1831275.

Stability boundaries, percolation threshold, and two-phase coexistence for polydisperse fluids of adhesive colloidal particles.

The Journal of chemical physics

Riccardo Fantoni, Domenico Gazzillo, Achille Giacometti

Affiliations

  1. Istituto Nazionale per la Fisica della Materia and Dipartimento di Chimica Fisica, Università di Venezia, S. Marta DD 2137, I-30123 Venezia, Italy. [email protected]

PMID: 15740221 DOI: 10.1063/1.1831275

Abstract

We study the polydisperse Baxter model of sticky hard spheres (SHS) in the modified mean spherical approximation (mMSA). This closure is known to be the zero-order approximation C0 of the Percus-Yevick closure in a density expansion. The simplicity of the closure allows a full analytical study of the model. In particular we study stability boundaries, the percolation threshold, and the gas-liquid coexistence curves. Various possible subcases of the model are treated in details. Although the detailed behavior depends upon the particularly chosen case, we find that, in general, polydispersity inhibits instabilities, increases the extent of the nonpercolating phase, and diminishes the size of the gas-liquid coexistence region. We also consider the first-order improvement of the mMSA (C0) closure (C1) and compare the percolation and gas-liquid boundaries for the one-component system with recent Monte Carlo simulations. Our results provide a qualitative understanding of the effect of polydispersity on SHS models and are expected to shed new light on the applicability of SHS models for colloidal mixtures.

(c) 2005 American Institute of Physics.

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