Charge Renormalization, Effective Interactions, and Thermodynamics of Deionized Colloidal Suspensions

Abstract

Thermodynamic properties of charge-stabilised colloidal suspensions depend sensitively on the effective charge of the macroions, which can be substantially lower than the bare charge in the case of strong counterion-macroion association. A theory of charge renormalization is proposed, combining an effective one-component model of charged colloids with a thermal criterion for distinguishing between free and associated counterions. The theory predicts, with minimal computational effort, osmotic pressures of deionized suspensions of highly charged colloids in close agreement with large-scale simulations of the primitive model.

15 pages, 7 figures

References in corpus (4)

• Charge renormalization for effective interactions of colloids at water interfaces
• Nonlinear screening and gas-liquid separation in suspensions of charged colloids
• Phase Separation in Charge-Stabilized Colloidal Suspensions: Influence of Nonlinear Screening
• Electroneutrality and Phase Behavior of Colloidal Suspensions

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• Effective Electrostatic Interactions in Colloid-Nanoparticle Mixtures
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• A correlation-hole approach to the electric double layer with counter-ions only
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• Effective interactions, structure, and pressure in charge-stabilized colloidal suspensions: Critical assessment of charge renormalization methods
• Renormalized jellium model for colloidal mixtures