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Zhang, J. ; Drechsler, A. ; Grundke, K. ; Kwok, D. Y.
The similarity of electric double-layer interaction from the general Poisson-Boltzmann theory

We studied electric double-layer (EDL) interactions in electrolytes with different valence combinations. Our results show that the interactions are similar for electrolytes with the same co-ion valences and concentrations and such similarity increases with the co-ion valence and surface potential. A scaled surface potential was defined and found to be useful in characterizing the difference in EDL interaction. These results show that co-ions play a more important role than counterions in determining EDL potential and interaction in an electrolyte solution, especially for systems with high co-ion valence and/or high surface potentials.

Source
Journal of Colloid and Interface Science 300, 391-395

DOI
http://dx.doi.org/10.1016/j.jcis.2006.03.019

Published
December 2006
 
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