Counter-ion release and electrostatic adsorption

Abstract

The effective charge of a rigid polyelectrolyte (PE) approaching an oppositely charged surface is studied. The cases of a weak (annealed) and strongly charged PE with condensed counterions (such as DNA) are discussed. In the most interesting case of the adsorption onto a substrate of low dielectric constant (such as a lipid membrane or a mica sheet) the condensed counterions are not always released as the PE approaches the substrate, because of the major importance of the image charge effect. For the adsorption onto a surface with freely moving charges, the image charge effect becomes less important and full release is often expected.

8 pages, 1 figure

References in corpus (2)

• Screening of a macroion by multivalent ions: Correlation induced inversion of charge
• The fraction of condensed counterions around a charged rod: Comparison of Poisson-Boltzmann theory and computer simulations

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• Critical adsorption of polyelectrolytes onto charged Janus nanospheres
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• Overcharging and reentrant condensation of thermoresponsive ionic microgels
• The effect of confinement on the interaction between two like-charged rods
• Correlation-induced DNA adsorption on like-charged membranes
• Poisson-Boltzmann for oppositely charged bodies: an explicit derivation
• Distribution of counterions and interaction between two similarly charged dielectric slabs: Roles of charge discreteness and dielectric inhomogeneity
• Interaction regimes for oppositely charged plates with multivalent counterions
• Behavior of rod-like polyelectrolytes near an oppositely charged surface
• Like-charge polymer-membrane complexation mediated by multivalent cations: one-loop-dressed strong coupling theory
• Orientational transition and complexation of DNA with anionic membranes: weak and intermediate electrostatic coupling
• Scaling Theory of Polyelectrolyte Adsorption on Repulsive Charged Surface
• Salt-induced reentrant stability of polyion-decorated particles with tunable surface charge density