硬核Yukawa流体中胶体粒子间的耗尽势

doi:10.3866/PKU.WHXB20111003

物理化学学报 >> 2011, Vol. 27 >> Issue (10): 2400-2405.doi: 10.3866/PKU.WHXB20111003

硬核Yukawa流体中胶体粒子间的耗尽势

孔维元¹, 王海军^1,2,3, 顾芳¹

1. 河北大学化学与环境科学学院, 河北保定 071002;
2. 教育部药物化学与分子诊断重点实验室, 河北保定 071002;
3. 中国科学院国际材料物理中心, 沈阳 110016

收稿日期:2011-04-05 修回日期:2011-07-17 发布日期:2011-09-27
通讯作者: 王海军 E-mail:whj@hbu.edu.cn
基金资助:
国家自然科学基金(20873035)资助项目

Depletion Potential between Two Colloid Particles Immersed in a Hard-Core Yukawa Fluid

KONG Wei-Yuan¹, WANG Hai-Jun^1,2,3, GU Fang¹

1. College of Chemistry and Environmental Science, Hebei University, Baoding 071002, Hebei Province, P. R. China;
2. Key Laboratory of Medical Chemistry and Molecular Diagnosis, Ministry of Education, Baoding 071002, Hebei Province, P. R. China;
3. International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, P. R. China

Received:2011-04-05 Revised:2011-07-17 Published:2011-09-27
Contact: WANG Hai-Jun E-mail:whj@hbu.edu.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (20873035).

摘要/Abstract

摘要： 基于Roth、Evans 和Dietrich 有关耗尽势的密度泛函理论研究了硬核Yukawa (HCY)流体中胶体粒子间的耗尽势. 在极稀溶液条件下, 通过计算两个胶体粒子在不同条件下的耗尽势, 分析了HCY流体的相关因素对耗尽势的影响. 结果表明, 胶体粒子与溶剂分子的尺寸比率、HCY流体分子间的相互作用、HCY流体分子的体相密度以及胶体粒子与流体分子之间的相互作用等因素均可对胶体粒子间耗尽势产生显著影响. 研究结果可为实验上调控胶体粒子间的相互作用提供可能的线索.

关键词: 硬核Yukawa流体, 耗尽势, 胶体粒子, 密度泛函理论

Abstract: The depletion potential between two colloid particles immersed in a hard-core Yukawa fluid was investigated by density functional theory for the depletion potential proposed by Roth, Evans, and Dietrich. An attempt was made to study the effects of several factors concerning the colloid particles and the solvent molecules on the depletion potential, which are the size ratio of the colloid particle to the solvent, the interaction between solvent molecules, the packing fraction of the solvent, and the interaction between the colloid particle and the solvent. By means of the depletion potential presented under various conditions, it is shown that the effects of these factors on the depletion potential are significant and this can provide some useful clues on regulating the interaction between colloid particles in related experiments.

Key words: Hard-core Yukawa fluid, Depletion potential, Colloid particle, Density functional theory

MSC2000:

O642

孔维元, 王海军, 顾芳. 硬核Yukawa流体中胶体粒子间的耗尽势[J]. 物理化学学报, 2011, 27(10): 2400-2405.

KONG Wei-Yuan, WANG Hai-Jun, GU Fang. Depletion Potential between Two Colloid Particles Immersed in a Hard-Core Yukawa Fluid[J]. Acta Phys. -Chim. Sin., 2011, 27(10): 2400-2405.

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硬核Yukawa流体中胶体粒子间的耗尽势

Depletion Potential between Two Colloid Particles Immersed in a Hard-Core Yukawa Fluid

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