Overcharging of a macroion by an oppositely charged polyelectrolyte

被引：118
|
作者：
Nguyen, TT [1 ]
Shklovskii, BI [1 ]
机构：
[1] Univ Minnesota, Dept Phys, Inst Theoret Phys, Minneapolis, MN 55455 USA
来源：
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2001年 / 293卷 / 3-4期
基金：
美国国家科学基金会;
关键词：
charge inversion; polyelectrolyte; spherical macroion;
D O I：
10.1016/S0378-4371(01)00020-6
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：324 / 338
页数：15
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