Coupling effects of depletion interactions in a three-sphere colloidal system

In a three-sphere system, the middle sphere is acted upon by two opposite depletion forces from the other two spheres. It is found that, in this system, the two depletion forces are coupled with each other and result in a strengthened depletion force. So the difference of the depletion forces of the...

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Published inChinese physics B Vol. 22; no. 5; pp. 587 - 590
Main Author 陈泽顺 戴刚 高海峡 肖长明
Format Journal Article
LanguageEnglish
Published 01.05.2013
Subjects
Colloids
Computer simulation
Confinement
Depletion
Joining
Mathematical models
Monte Carlo methods
几何约束
力耦合
排空
数值结果
耦合作用
耦合效应
胶体系统
蒙特卡罗模拟
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Summary:In a three-sphere system, the middle sphere is acted upon by two opposite depletion forces from the other two spheres. It is found that, in this system, the two depletion forces are coupled with each other and result in a strengthened depletion force. So the difference of the depletion forces of the three-sphere system and its corresponding two two-sphere systems is introduced to describe the coupling effect of the depletion interactions. The numerical results obtained by Monte- Carlo simulations show that this coupling effect is affected by both the concentration of small spheres and the geometrical confinement. Meanwhile, it is also found that the mechanisms of the coupling effect and the effect on the depletion force from the ~eometry factor are the same.
Bibliography:In a three-sphere system, the middle sphere is acted upon by two opposite depletion forces from the other two spheres. It is found that, in this system, the two depletion forces are coupled with each other and result in a strengthened depletion force. So the difference of the depletion forces of the three-sphere system and its corresponding two two-sphere systems is introduced to describe the coupling effect of the depletion interactions. The numerical results obtained by Monte- Carlo simulations show that this coupling effect is affected by both the concentration of small spheres and the geometrical confinement. Meanwhile, it is also found that the mechanisms of the coupling effect and the effect on the depletion force from the ~eometry factor are the same.
Chen Ze-Shun, Dai Gang, Gao Hai-Xia, and Xiao Chang-Ming（ 1 Department of Physics, Hunan Normal University, Changsha 410081, China 2 Department of Electronic Engineering, Hunan University of Science and Engineering, Yongzhou 425100, China）
three-sphere system, coupling effect of depletion interactions
11-5639/O4
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/22/5/058202