Europhys. Lett.
Volume 68, Number 4, November 2004
Page(s) 487 - 493
Section Atomic and molecular physics
Published online 23 October 2004
Europhys. Lett., 68 (4), pp. 487-493 (2004)
DOI: 10.1209/epl/i2004-10245-y

Overcharging of complexes formed by oppositely charged, interpenetrable macroions

I. I. Potemkin

Department of Physics, Moscow State University - Moscow 119992, Russia

received 25 June 2004; accepted in final form 28 September 2004
published online 23 October 2004

The mean-field theory of overcharging of a spherical polyanion, which is penetrable for several polycations, is developed. The effect of counterions is explicitly taken into account. It is shown that the overcharging is always driven by electrostatic interactions, whereas counterions can either promote or prohibit this effect.

36.20.-r - Macromolecules and polymer molecules.
87.15.Nn - Properties of solutions; aggregation and crystallization of macromolecules.
61.20.Qg - Structure of associated liquids: electrolytes, molten salts, etc.

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