Ion correlation driven like-charge attraction in multivalent salt solutions
arXiv:2306.10137 · doi:10.1063/5.0181061
Abstract
The electrostatic double layer force is key to determining the stability and self-assembly of charged colloids and many other soft matter systems. Fully understanding the attractive force between two like-charged surfaces remains a great challenge. Here we apply the modified Gaussian renormalized fluctuation theory to study ion correlation-driven like-charge attraction in multivalent salt solutions. The effects of spatially varying ion correlations on the structure of overlapping double layers and their free energy are self-consistently accounted for. In the presence of multivalent salts, increasing surface charge or counterion valency leads to a short-range attraction. We demonstrate that although both overcharging and like-charge attraction are outcomes of ion correlation, there is no causal relationship between them. Our theory also captures the non-monotonic dependence of like-charge attraction on multivalent salt concentration. The reduction of attraction at high salt concentrations could be a contributing factor towards the reentrant stability of charged colloidal suspensions. Our theoretical predictions are consistent with the observations reported in experiments and simulations.
References in corpus (24)
- Double layer in ionic liquids: Overscreening vs. crowding
- Electrostatic correlations: from Plasma to Biology
- Effective interactions between electric double-layers
- Screening of a macroion by multivalent ions: Correlation induced inversion of charge
- Beyond Poisson-Boltzmann: Fluctuations and Correlations
- Reentrant Condensation of DNA induced by Multivalent Counterions
- Salt-induced collapse and reexpansion of highly charged flexible polyelectrolytes
- Variational charge renormalization in charged systems
- Simple Model for Attraction between Like-Charged Polyions
- Attraction between DNA molecules mediated by multivalent ions
- Variational approach for electrolyte solutions: from dielectric interfaces to charged nanopores
- Effective macroion charge and stability of highly asymmetric electrolytes at various salt conditions
- Short range attraction between two similarly charged silica surfaces
- Overcharging, charge inversion and reentrant condensation: Using highly-charged polyelectrolytes in tetravalent salt solutions as an example of study
- Density-functional theory for attraction between like-charged plates
- On the theoretical description of weakly charged surfaces
- Electrostatic correlation induced ion condensation and charge inversion in multivalent electrolytes
- On the nature of overcharging and charge inversion in electrical double layers
- Attractive Interaction between Fully Charged Lipid Bilayers in a Strongly-Confined Geometry
- Like-charge attraction and opposite-charge decomplexation between polymers and DNA molecules
- Self-Consistent Description of Vapor-Liquid Interface in Ionic Fluids
- Potential of mean force between like-charged nanoparticles: Many-body effect
- Incorporating Ion-Specific van der Waals and Soft Repulsive Interactions in the Poisson-Boltzmann Theory of Electrical Double Layers
- Lateral depletion effect on two-dimensional ordering of bacteriorhodopsins in a lipid bilayer: A theoretical study based on a binary hard-disk model
Cited by in corpus (4)
- On the nature of overcharging and charge inversion in electrical double layers
- Electrostatic Correlation Augmented Self-Consistent Field Theory and Its Application to Polyelectrolyte Brushes
- Ion Correlation-Driven Hysteretic Adhesion and Repulsion between Opposing Polyelectrolyte Brushes
- Understanding long-range opposite charge repulsion in multivalent salt solutions