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OSCILLATORY SURFACE FORCES - A TEST OF THE SUPERPOSITION APPROXIMATION

机译:振荡表面力-叠加逼近的试验

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We report on the density functional theory calculations of electrolyte solutions confined between charged plates. Experiments with the surface forces apparatus have shown that for charged cylinders in simple solvents the surface force is oscillatory at short range. It has been suggested that the total force be considered a superposition of the electrostatic repulsion, the solvation force of a pure solvent, and the van der Waals attraction. In this paper we use the Rosenfeld-Kierlik-Rosinberg (RKR) functional to study a three-component electrolyte solution and explicitly test the superposition approximation, We find that the superposition on approximation is a good approximation when the surface charge is low and the salt concentration is high. We also find that a three-component electrolyte can display short-range equilibrium separations in the absence of van der Waals interactions. (C) 1996 American Institute of Physics. [References: 25]
机译:我们报告了封闭的带电板之间的电解质溶液的密度泛函理论计算。用表面力装置进行的实验表明,对于装满溶剂的圆柱体,在简单溶剂中,表面力在短范围内会产生振荡。已经提出总力被认为是静电斥力,纯溶剂的溶剂化力和范德华吸引力的叠加。在本文中,我们使用Rosenfeld-Kierlik-Rosinberg(RKR)函数研究三组分电解质溶液,并明确测试了叠加近似,我们发现,当表面电荷较低且盐分较低时,近似的叠加是良好的近似浓度高。我们还发现,在没有范德华相互作用的情况下,三组分电解质可以显示短程平衡分离。 (C)1996年美国物理研究所。 [参考:25]

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