Interaction between Charged Surfaces Mediated by Rodlike Counterions: The Influence of Discrete Charge Distribution in the Solution and on the Surfaces

The interaction between two charged surfaces, with discrete or uniform charge distributions, embedded in a solution of rodlike counterions has been studied. Monte Carlo simulations and density functional theory have been applied to study the concentration profiles of counterions and the force betwee...

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Bibliographic Details
Published in:Langmuir 2010-05, Vol.26 (9), p.6343-6349
Main Authors: Grime, John M. A, Khan, Malek O, Bohinc, Klemen
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Exact sciences and technology
Fysikalisk kemi
General and physical chemistry
Interfaces: Adsorption, Reactions, Films, Forces
Kemi
Monte Carlo Method
NATURAL SCIENCES
NATURVETENSKAP
Osmotic Pressure
Physical chemistry
Quantum Theory
Solutions - chemistry
Static Electricity
Surface physical chemistry
Surface Properties
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Summary:The interaction between two charged surfaces, with discrete or uniform charge distributions, embedded in a solution of rodlike counterions has been studied. Monte Carlo simulations and density functional theory have been applied to study the concentration profiles of counterions and the force between the charged surfaces. We show that for low surface charge densities the repulsive force between like-charged surfaces is observed regardless of the rod length. Where high surface charge densities are present, attractive forces at surface separations related to the rod length are observed.
ISSN:0743-7463
1520-5827
1520-5827
DOI:10.1021/la903940j