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Effect of Size Polydispersity on Melting of Charged Colloidal Systems

Yong Chen
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Abstract

We introduce simple prescriptions of the Yukawa potential to describe the effect of size polydispersity and macroion shielding effect in charged colloidal systems. The solid-liquid phase boundaries were presented with the Lindemann criterion based on molecular dynamics simulations. Compared with the Robbins-Kremer-Grest simulation results, a deviation of melting line is observed at small $λ$, which means large macroion screening length. This deviation of phase boundary is qualitatively consistent with the simulation result of the nonlinear Poisson-Boltzmann equation with full many-body interactions. It is found that this deviation of the solid-liquid phase behaviour is sensitive to the screening parameter.

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BibTeXRIS

Yong Chen. 2006-03-10. Effect of Size Polydispersity on Melting of Charged Colloidal Systems. https://doi.org/10.1088/0256-307x%2F20%2F9%2F363

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