中国物理B ›› 2009, Vol. 18 ›› Issue (3): 1287-1293.doi: 10.1088/1674-1056/18/3/075

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Effects of electrostatic interactions and geometrical confinements on depletion interactions in charged colloidal system

黄立新, 肖长明, 胡苹, 高海峡   

  1. Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University, Changsha 410081, China; Department of Physics, Hunan Normal University, Changsha 410081, China
  • 收稿日期:2008-09-22 修回日期:2008-10-12 出版日期:2009-03-20 发布日期:2009-03-20

Effects of electrostatic interactions and geometrical confinements on depletion interactions in charged colloidal system

Huang Li-Xin(黄立新)a)b), Xiao Chang-Ming(肖长明)a)b)†, Hu Ping(胡苹)a)b), and Gao Hai-Xia(高海峡)a)b)   

  1. a Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University, Changsha 410081, China; b Department of Physics, Hunan Normal University, Changsha 410081, China
  • Received:2008-09-22 Revised:2008-10-12 Online:2009-03-20 Published:2009-03-20

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摘要： In a charged colloidal system, the influence on depletion interaction between two like-charged macro-ions is studied through Monte Carlo simulation in this paper. The numerical results show that this depletion force is affected by both the electrostatic interactions between charged spheres and charged plates and by the geometrical factor of the two charged plates, and they further indicate that the influence of geometrical confinement on the depletion interaction is larger than that of electrostatic potential.

关键词: depletion interaction, geometrical confinement

Abstract: In a charged colloidal system, the influence on depletion interaction between two like-charged macro-ions is studied through Monte Carlo simulation in this paper. The numerical results show that this depletion force is affected by both the electrostatic interactions between charged spheres and charged plates and by the geometrical factor of the two charged plates, and they further indicate that the influence of geometrical confinement on the depletion interaction is larger than that of electrostatic potential.

Key words: depletion interaction, geometrical confinement

中图分类号:  (Colloids)

  • 82.70.Dd
61.20.Ja (Computer simulation of liquid structure)