Colloidal charge reversal : dependence on the ionic size and the electrolyte concentration
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Date
2008Type
Abstract
Extensive Monte Carlo simulations and scaling arguments are used to study the colloidal charge reversal. The critical colloidal surface charge density σc at which the reversal first appears is found to depend strongly on the ionic size. We find that σc has an inflection point as a function of the electrolyte concentration. The width of the plateau region in the vicinity of the inflection point depends on the temperature and the ionic radius a. In agreement with the theoretical predictions it is ...
Extensive Monte Carlo simulations and scaling arguments are used to study the colloidal charge reversal. The critical colloidal surface charge density σc at which the reversal first appears is found to depend strongly on the ionic size. We find that σc has an inflection point as a function of the electrolyte concentration. The width of the plateau region in the vicinity of the inflection point depends on the temperature and the ionic radius a. In agreement with the theoretical predictions it is found that the critical colloidal charge above which the electrophoretic mobility becomes reversed diverges as Zc∼1/a2 in the limit a→0. ...
In
The journal of chemical physics. New York. Vol. 129, no. 12 (Sep. 2008), 124506, 5p.
Source
Foreign
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