Effective charge of colloidal particles

Effective charge of colloidal particles
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DOI:
10.1063/1.1824013
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发表时间:
2004-12-15
影响因子:
4.4
通讯作者:
Levin, Y
Levin, Y
中科院分区:
化学2区
文献类型:
--
作者:
Diehl, A;Levin, Y

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提出了一种新的有效胶体电荷的动力学定义,特别适用于蒙特卡罗和分子动力学模拟。结果表明,对于含有单价反离子的胶体悬浮液,“动力学”有效电荷与用Alexander公式计算的“统计”有效电荷完全一致。在多价离子的情况下,有效电荷的行为与泊松-玻尔兹曼理论的预测有本质上的不同。(C)2004年美国物理研究所。
A new dynamical definition of the effective colloidal charge, especially suitable for the Monte Carlo and Molecular-dynamics simulations, is proposed. It is shown that for aqueous colloidal suspensions containing monovalent counterions the "dynamical" effective charge agrees perfectly with the "statistical" effective charge calculated using the Alexander prescription. In the case of multivalent ions, the effective charge behaves in a qualitatively different way from the predictions of the Poisson-Boltzmann theory. (C) 2004 American Institute of Physics.