Overcharging of a macroion by an oppositely charged polyelectrolyte

T. T. Nguyen; B. I. Shklovskii

doi:10.1016/S0378-4371(01)00020-6

Overcharging of a macroion by an oppositely charged polyelectrolyte

T. T. Nguyen, B. I. Shklovskii

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Abstract

Complexation of a polyelectrolyte with an oppositely charged spherical macroion is studied for both salt-free and salty solutions. When a polyelectrolyte winds around the macroion, its turns repel each other and form an almost equidistant solenoid. It is shown that this repulsive correlations of turns lead to the charge inversion: more polyelectrolyte winds around the macroion than it is necessary to neutralize it. The charge inversion becomes stronger with increasing concentration of salt and can exceed 100%. Monte-Carlo simulation results agree with our analytical theory.

Original language	English (US)
Pages (from-to)	324-338
Number of pages	15
Journal	Physica A: Statistical Mechanics and its Applications
Volume	293
Issue number	3-4
DOIs	https://doi.org/10.1016/S0378-4371(01)00020-6
State	Published - Apr 15 2001

Bibliographical note

Funding Information:
The authors are grateful to A.Yu. Grosberg for many useful discussions and to S. Stoll and P. Chodanowski for the possibility to read their paper [16] before the publication. This work was supported by NSF DMR-9985985.

Keywords

Charge inversion
Polyelectrolyte
Spherical macroion

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title = "Overcharging of a macroion by an oppositely charged polyelectrolyte",

abstract = "Complexation of a polyelectrolyte with an oppositely charged spherical macroion is studied for both salt-free and salty solutions. When a polyelectrolyte winds around the macroion, its turns repel each other and form an almost equidistant solenoid. It is shown that this repulsive correlations of turns lead to the charge inversion: more polyelectrolyte winds around the macroion than it is necessary to neutralize it. The charge inversion becomes stronger with increasing concentration of salt and can exceed 100%. Monte-Carlo simulation results agree with our analytical theory.",

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N2 - Complexation of a polyelectrolyte with an oppositely charged spherical macroion is studied for both salt-free and salty solutions. When a polyelectrolyte winds around the macroion, its turns repel each other and form an almost equidistant solenoid. It is shown that this repulsive correlations of turns lead to the charge inversion: more polyelectrolyte winds around the macroion than it is necessary to neutralize it. The charge inversion becomes stronger with increasing concentration of salt and can exceed 100%. Monte-Carlo simulation results agree with our analytical theory.

AB - Complexation of a polyelectrolyte with an oppositely charged spherical macroion is studied for both salt-free and salty solutions. When a polyelectrolyte winds around the macroion, its turns repel each other and form an almost equidistant solenoid. It is shown that this repulsive correlations of turns lead to the charge inversion: more polyelectrolyte winds around the macroion than it is necessary to neutralize it. The charge inversion becomes stronger with increasing concentration of salt and can exceed 100%. Monte-Carlo simulation results agree with our analytical theory.

KW - Charge inversion

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Overcharging of a macroion by an oppositely charged polyelectrolyte

Abstract

Bibliographical note

Keywords

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