Simulation of charge reversal in salty environments: Giant overcharging?

Abstract

We have performed MD simulations of a highly charged colloid in a solution of 3:1 and additional 1:1 salt. The dependency of the colloid's inverted charge on the concentration of the additional 1:1 salt has been studied. Most theories predict, that the inverted charge increases when the concentration of monovalent salt grows, up to what is called "giant overcharging", while experiments and simulational studies observe the opposite. Our simulations agree with the experimental findings and shed light onto the weaknesses of the theories.

arXiv commentReplaced b&w figures by color figures for the online version

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Cited by in corpus (11)

• Simulations of Coulomb systems with slab geometry using an efficient 3d Ewald summation method
• Dressed Counterions: Poly- and monovalent ions at charged dielectric interfaces
• Asymmetric Coulomb fluids at randomly charged dielectric interfaces: Anti-fragility, overcharging and charge inversion
• Polyelectrolyte Electrophoresis in Nanochannels: A Dissipative Particle Dynamics Simulation
• Colloidal charge reversal: Dependence on the ionic size and the electrolyte concentration
• A simulational and theoretical study of the spherical electrical double layer for a size-asymmetric electrolyte: the case of big coions
• Electrostatic correlation induced ion condensation and charge inversion in multivalent electrolytes
• Self-consistent field model for strong electrostatic correlations and inhomogeneous dielectric media
• Non-mean-field screening by multivalent counterions
• A random batch Ewald method for particle systems with Coulomb interactions
• Charge Regulation Effect on Nanoparticles Interaction Mediated by Polyelectrolyte