Coupling between bulk- and surface chemistry in suspensions of charged colloids

Abstract

The ionic composition and pair correlations in fluid phases of realistically salt-free charged colloidal sphere suspensions are calculated in the primitive model. We obtain the number densities of all ionic species in suspension, including low-molecular weight microions, and colloidal macroions with acidic surface groups, from a self-consistent solution of a coupled physicochemical set of nonlinear algebraic equations and non-mean-field liquid integral equations. Here, we study suspensions of colloidal spheres with sulfonate or silanol surface groups, suspended in demineralized water that is saturated with carbon dioxide under standard atmosphere. The only input required for our theoretical scheme are the acidic dissociation constants pKa, and effective sphere diameters of all involved ions. Our method allows for an ab initio calculation of colloidal bare and effective charges, at high numerical efficiency.

References in corpus (13)

• Interplay of pH and Binding of Multivalent Metal Ions: Charge Inversion and Reentrant Condensation in Protein Solutions
• Direct measurement of three-body interactions
• Testing the relevance of effective interaction potentials between highly charged colloids in suspension
• Density-dependent interactions and structure of charged colloidal dispersions in the weak screening regime
• Structure and Short-time Dynamics in Suspensions of Charged Silica Spheres in the entire Fluid Regime
• A self-consistent renormalized Jellium approach for calculating structural and thermodynamic properties of charge stabilized colloidal suspensions
• The renormalized jellium model for spherical and cylindrical colloids
• Macroion correlation effects in electrostatic screening and thermodynamics of highly charged colloids
• Highly asymmetric electrolytes in the primitive model: Hypernetted chain solution in arbitrary spatial dimensions
• Primitive model electrolytes. A comparison of the HNC approximation for the activity coefficient with Monte Carlo data
• The polydisperse cell model: Non-linear screening and charge renormalization in colloidal mixtures
• Electrostatic Interactions between Janus Particles
• Non-monotonic density dependence of the diffusion of DNA fragments in low-salt suspensions

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• Calculating particle pair potentials from fluid-state pair correlations: Iterative Ornstein-Zernike Inversion
• Non-Monotonic Concentration Dependence of the Electro-Phoretic Mobility of Charged Spheres in Realistic Salt Free Suspensions
• Rotational self-diffusion in suspensions of charged particles: Revised Beenakker-Mazur and Pairwise Additivity methods versus numerical simulations
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• Renormalized jellium model for colloidal mixtures
• Jellium and Cell Model for Titratable Colloids with Continuous Size Distribution
• Charge fluctuations in charge regulated systems: dependence on statistical ensemble
• Ionization at a solid-water interface in an applied electric field: Charge regulation
• Structural correlations in highly asymmetric binary charged colloidal mixtures