Interactions between Charged Particles with bathing Multivalent Counterions: Experiments {\it vs} Dressed Ion Theory

Abstract

We compare the recent experimentally measured forces between charged colloidal particles, as well as their effective surface potentials (surface charge) in the presence of multivalent counterions in a bathing monovalent salt solution, with the predictions of the dressed ion theory of strongly charged colloidal systems. The benchmark for comparison is provided by the DLVO theory and the deviations from its predictions at small separations are taken as an indication of the additional non-DLVO attractions that can be fitted by an additional phenomenological exponential term. The parameters characterizing this non-DLVO exponential term as well as the dependencies of the effective potential on the counterion concentration and valency predicted by the dressed ion theory are well within the experimental values. This suggests that the deviations from the DLVO theory are probably caused by ion correlations as formalized within the dressed ion theory.

References in corpus (6)

• Statics and Dynamics of Strongly Charged Soft Matter
• Strong Coupling Electrostatics in the Presence of Dielectric Inhomogeneities
• Charged Membranes: Poisson-Boltzmann theory, DLVO paradigm and beyond
• Weak and Strong-Coupling Electrostatic Interactions between Asymmetrically Charged Planar Surfaces
• One-dimensional counterion gas between charged surfaces: Exact results compared with weak- and strong-coupling analysis
• Titratable Macroions in Multivalent Electrolyte Solutions: Strong Coupling Dressed Ion Approach

Cited by in corpus (8)

• Ionic structure around polarizable metal nanoparticles in aqueous electrolytes
• Interactions between Silica Particles in the Presence of Multivalent Coions
• Like-charge polymer-membrane complexation mediated by multivalent cations: one-loop-dressed strong coupling theory
• Role of metallic core for the stability of virus-like particles in strongly coupled electrostatics
• Attraction of like-charged walls with counterions only: Exact results for the 2D cylinder geometry
• Forces between Silica Particles in Isopropanol Solutions of 1:1 Electrolytes
• Interactions between Zwitterionic Membranes in Complex Electrolytes
• Rodlike counterions at heterogeneously charged surfaces