Colloids electrophoresis for strong and weak ion diffusivity

Abstract

We study the electrophoretic flow of suspensions of charged colloids with a mesoscopic method that allows to model generic experimental conditions. We show that for highly charged colloids their electrophoretic mobility increases significantly and displays a mobility maximum on increasing the colloidal charge for all salt concentrations. The electrophoretic mobility of highly charged colloids is also enhanced significantly when ion advection is dominant, leading to a strong heterogeneity in the local electrophoretic response especially at low salt concentration, when ion diffuse layers overlap.

4 pages, 4 figures, Phys. Rev. Lett., in press

References in corpus (2)

• Colloidal electrophoresis: Scaling analysis, Green-Kubo relation, and numerical results
• Determination of the zeta potential for highly charged colloidal suspensions

Cited by in corpus (13)

• Mesoscopic Modelling and Simulation of Soft Matter
• Dynamic and Dielectric Response of Charged Colloids in Electrolyte Solutions to External Electric Fields
• Moving Charged Particles in Lattice Boltzmann-Based Electrokinetics
• Lattice Boltzmann Electrokinetics simulation of nanocapacitors
• Limiting Spurious Flow in Simulations of Electrokinetic Phenomena
• Mesoscopic electrohydrodynamic simulations of binary colloidal suspensions
• Computer Simulations of Charged Colloids in Alternating Electric Fields
• AC-field-induced Polarization for Uncharged Colloids in Salt Solution: A Dissipative Particle Dynamics Simulation
• Electrokinetic and hydrodynamic properties of charged-particles systems: From small electrolyte ions to large colloids
• Giant enhancement of hydrodynamically enforced entropic trapping in thin channels
• Computer simulations of single particles in external electric fields
• A Dissipative-Particle-Dynamics Model for Simulating Dynamics of Charged Colloid
• Linear response functions of an electrolyte solution in a uniform flow