Charge asymmetric electrolytes around a rigid cylindrical polyelectrolyte: A generalization of the capacitive compactness
Article

 Overview

 Research

 Identity

 Additional Document Info

 View All

Overview
abstract

The surface mean electrostatic potential and capacitive compactness of the electrical double layer surrounding an infinite rigid cylindrical polyelectrolyte are analysed for equallysized 1:z%2b aqueous electrolytes. Monte Carlo simulations, the nonlinear Poisson–Boltzman equation, the modified Poisson–Boltzmann theory, and the hypernetted chain/mean spherical approximation integral equation are used to examine the role of multivalent cations (coions) when the properties of monovalent anions (counterions) are fixed. A nonzero mean electrostatic potential in the neighbourhood of an uncharged polyelectrolyte is predicted by the simulations and the modified Poisson–Boltzmann theory in the presence of multivalent cations. The concept of capacitive compactness is generalised to overcome the divergence found in the classical definition, when a nonzero potential at the point of zero charge is present. With a highly electrified colloidal surface an inversion is observed, as a function of colloidal charge, in the precedence of the mean electrostatic potential near the polyelectrolyte%27s surface and of the capacitive compactness between 1:%2b1 and 1:z%2b electrolytes. © 2022 Elsevier B.V.
publication date
funding provided via
published in
Research
keywords

Capacitive compactness; Electrical double layer; Ionic specific adsorption; Multivalent coions Boltzmann equation; Electrostatics; Integral equations; Intelligent systems; Monte Carlo methods; Poisson equation; Positive ions; Capacitive compactness; Chargeasymmetric electrolytes; Electrical double layers; Electrostatic potentials; Generalisation; Ionic specific adsorption; Multivalent cations; Multivalent coion; PoissonBoltzmann theory; Specific adsorption; Polyelectrolytes
Identity
Digital Object Identifier (DOI)
PubMed ID
Additional Document Info
start page
end page
volume
issue