Effective pair potentials for charged colloidal particles
Effective pair potentials for charged colloidal particles
复制标题
带电胶体粒子的有效对电势
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
M. D. Carbajal
中科院分区：
文献类型：
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作者：
P. González;M. D. Carbajal
提出了离子流体的一般形式。我们报告的分布函数，直接满足Stillinger-Lovett矩条件的一般和精确的表达式。给出了带电胶体粒子间有效对势的一般精确表达式。这些一般表达式是多分量Ornstein-Zernike（OZ）方程和带电系统中直接关联函数的渐近行为的直接结果。有效对势表现为两个不同的部分：短程和静电。对于原始模型（PM）与点状小离子的静电分量减少，足够大的距离，屏蔽库仑电位与重整化电荷。有效的静电相互作用的一般表达式给出了一个清晰的洞察力的Derjaguin-Landau-Verwey-Overbeek（DLVO）模型的有效性的具体条件和可能的方向，该模型可以改进。我们都...
A general formalism for ionic fluids is presented. We report general and exact expressions for the distribution functions which directly satisfy the Stillinger–Lovett moment conditions. General and exact expressions are also provided for the effective pair potentials among charged colloidal particles. These general expressions are a direct consequence of the multicomponent Ornstein–Zernike (OZ) equations and the asymptotic behavior of the direct correlation functions in charged systems. The effective pair potentials show two distinct parts: short-ranged and electrostatic. For the primitive model (PM) with pointlike small ions the electrostatic component is reduced, for sufficiently large distances, to a screened Coulomb potential with renormalized charges. The general expression of the effective electrostatic interaction gives a clear insight of the specific conditions of validity of the Derjaguin–Landau–Verwey–Overbeek (DLVO) model and of the possible directions in which this model may be improved. We al...