Nonlinear screening and gas-liquid separation in suspensions of charged colloids

Abstract

We calculate phase diagrams of charged colloidal spheres (valency $Z$ and radius $a$) in a 1:1 electrolyte from multi-centered nonlinear Poisson-Boltzmann theory. Our theory takes into account charge-renormalization of the colloidal interactions and volume terms due to many-body effects. For valencies as small as Z=1 and as large as $10^4$ we find a gas--liquid spinodal instability in the colloid-salt phase diagram provided $Z\lB/a\gtrsim24\pm1$, where $\lB$ is the Bjerrum length.

arXiv commentaccepted by Phys. Rev. Lett

References in corpus (10)

• Long-range electrostatic interactions between like-charged colloids: steric and confinement effects
• Charge renormalization and phase separation in colloidal suspensions
• Effective Interactions and Volume Energies in Charged Colloids: Linear Response Theory
• Many-body interactions and melting of colloidal crystals
• Volume terms for charged colloids: a grand-canonical treatment
• On the fluid-fluid phase separation in charged-stabilized colloidal suspensions
• Nonlinear Screening and Effective Electrostatic Interactions in Charge-Stabilized Colloidal Suspensions
• Triplet correlations in two-dimensional colloidal model liquids
• Phase Separation in Charge-Stabilized Colloidal Suspensions: Influence of Nonlinear Screening
• Aging and ultra-slow equilibration in concentrated colloidal hard spheres

Cited by in corpus (13)

• Effective charges and virial pressure of concentrated macroion solutions
• Poisson-Boltzmann Theory of Charged Colloids: Limits of the Cell Model for Salty Suspensions
• Phase diagrams of colloidal spheres with a constant zeta-potential
• Charge regulation and ionic screening of patchy surfaces
• A Case Study of Sedimentation of Charged Colloids: The Primitive Model and the Effective One-Component Approach
• Effective Electrostatic Interactions in Colloid-Nanoparticle Mixtures
• Electroneutrality and Phase Behavior of Colloidal Suspensions
• Charge Renormalization, Effective Interactions, and Thermodynamics of Deionized Colloidal Suspensions
• Phase Separation of Charge-Stabilized Colloids: A Gibbs Ensemble Monte Carlo Simulation Study
• Colloid-oil-water-interface interactions in the presence of multiple salts: charge regulation and dynamics
• Alternating strings and clusters in suspensions of charged colloids
• Diffusion and conduction in a salt-free colloidal suspension via molecular dynamics simulations
• Machine-Learned Many-Body Potentials for Charged Colloids reveal Gas-Liquid Spinodal Instabilities only in the strong-coupling regime of Primitive Models