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Effects of the dielectric discontinuity on the counterion distribution in a colloidal suspension
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10.1063/1.3615940
/content/aip/journal/jcp/135/4/10.1063/1.3615940
http://aip.metastore.ingenta.com/content/aip/journal/jcp/135/4/10.1063/1.3615940
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

An illustrative representation of an ion of charge Q located at r i and its image charge Q′ located at the inversion point . The counterimage charge λ(u) is distributed from the center of colloid to the inversion point.

Image of FIG. 2.
FIG. 2.

The dashed lines represent the density profiles obtained using the present method and the symbols represent the profiles obtained by Messina (Ref. 32). The parameters of the simulations are: ε w = 80, ε c = 2, d = 3.57 Å, a = 7.5d, R = 40d, Z = 60, and r c = a + d/2 is the contact distance.

Image of FIG. 3.
FIG. 3.

Density profiles for various ε c . The symbols represent the density profiles obtained using the exact counterimage line-charge distribution, while the dashed lines are calculated using the approximate uniform counterimage line-charge distribution, Eqs. (5) and (6). The parameters of the simulations are the same as in Fig. 2, for α = 3.

Image of FIG. 4.
FIG. 4.

Density profiles of trivalent counterions for various concentrations of 1:1 electrolyte. The parameters of the simulations are the same as in Fig. 2 for R = 25d and Z = 40. The 3:1 concentration is fixed at 20 mM for all the curves.

Image of FIG. 5.
FIG. 5.

Maximum density of trivalent salt counterions as function of concentration of 1:1 electrolyte. The parameters of the simulations are: ε w = 80, ε c = 0, d = 4 Å, a = 30 Å, R = 70 Å, Z = 90.

Image of FIG. 6.
FIG. 6.

The density at contact of monovalent counterions for varying concentrations of 3:1 electrolyte. The parameters of the simulations are the same as in Fig. 5.

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/content/aip/journal/jcp/135/4/10.1063/1.3615940
2011-07-29
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effects of the dielectric discontinuity on the counterion distribution in a colloidal suspension
http://aip.metastore.ingenta.com/content/aip/journal/jcp/135/4/10.1063/1.3615940
10.1063/1.3615940
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