中国物理B ›› 2009, Vol. 18 ›› Issue (8): 3585-3590.doi: 10.1088/1674-1056/18/8/075

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Depletion interactions in cylindric pipeline

黄立新, 高海峡, 李春树, 肖长明   

  1. aKey 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
  • 收稿日期:2008-06-24 修回日期:2009-03-31 出版日期:2009-08-20 发布日期:2009-08-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10375042 and 10775018) and the Scientific Research Fund of Hunan Provincial Education Department and Hunan Provincial Natural Science Foundation of China (Grant No 08jj6043) and the Construct Program of the Key Discipline in Hunan Province, China.

Depletion interactions in cylindric pipeline

Huang Li-Xin(黄立新)a)b), Gao Hai-Xia(高海峡)a)b), Li Chun-Shu(李春树)a)b), and Xiao Chang-Ming(肖长明)a)b)†   

  1. aKey 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:2008-06-24 Revised:2009-03-31 Online:2009-08-20 Published:2009-08-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10375042 and 10775018) and the Scientific Research Fund of Hunan Provincial Education Department and Hunan Provincial Natural Science Foundation of China (Grant No 08jj6043) and the Construct Program of the Key Discipline in Hunan Province, China.

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摘要： In a colloidal system confined by a small cylindric pipeline, the depletion interaction between two large spheres is different to the system confined by two plates, and the influence on depletion interaction from the pipeline is related to both the size and shape of it. In this paper, the depletion interactions in the systems confined by pipelines of different sizes or different shapes are studied by Monte Carlo simulations. The numerical results show that the influence on depletion force from the cylindric pipeline is stronger than that from two parallel plates, and the depletion force will be strengthened when the diameter of the cylinder is decreased. In addition, we also find that the depletion interaction is rather affected if the shape change of the pipeline is slightly changed, and the influence on depletion force from the shape change is stronger than that from the size change.

Abstract: In a colloidal system confined by a small cylindric pipeline, the depletion interaction between two large spheres is different to the system confined by two plates, and the influence on depletion interaction from the pipeline is related to both the size and shape of it. In this paper, the depletion interactions in the systems confined by pipelines of different sizes or different shapes are studied by Monte Carlo simulations. The numerical results show that the influence on depletion force from the cylindric pipeline is stronger than that from two parallel plates, and the depletion force will be strengthened when the diameter of the cylinder is decreased. In addition, we also find that the depletion interaction is rather affected if the shape change of the pipeline is slightly changed, and the influence on depletion force from the shape change is stronger than that from the size change.

Key words: depletion interactions, cylindric pipeline, colloidal system

中图分类号:  (Properties of solutions of macromolecules)

  • 87.15.N-
82.39.Pj (Nucleic acids, DNA and RNA bases?) 87.14.G- (Nucleic acids) 87.15.R- (Reactions and kinetics)