胶体中排空作用的耦合效应  

Coupling effects of depletion interactions in colloidal system

作　　者：黄立新[1] 高海峡[1] 肖长明[1] 

机构地区：[1]湖南师范大学物理系,长沙410081

出　　处：《物理学报》2009年第8期5864-5870,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10375024;10775018);湖南省教育厅科研基金(批准号:08B028;06B057);湖南省自然科学基金(批准号:08JJ6043)资助的课题~~

摘　　要：通过Monte Carlo模拟和接受率方法研究了限制在圆柱形管道中大胶球之间以及大胶球与管壁之间排空作用的耦合效应.研究发现,当两个大胶球靠近时,大胶球与管道壁之间的排空作用也因与另一大胶球之间排空作用的耦合而得到了加强.此外,研究还发现,随靠近时,大胶球之间的排空作用因与大胶球与管道壁之间的排空作用耦合而得到加强,同样当大胶球与管道壁着圆柱形管道直径的减小,胶球之间、胶球与管道壁之间的排空作用的耦合效应是增强的.The colloidal system consisting of two large spheres confined in a cylindrical pipeline and immersed in the sea of small spheres is considered in this paper. In this system, the depletion interactions between the large spheres and the wall of cylindrical pipeline are studied by Monte Carlo simulation and acceptance ratio method. The numerical results show that the depletion forces are coupled, i. e., the depletion force between the two large spheres is strengthened by the depletion force between one of the large spheres and the wall of the cylindrical, meanwhile, the depletion force between one large sphere and the wall of the cylindrical is also strengthened by the depletion force of the two large spheres. Furthermore, through the numerical results, we found that the coupling effect is increased with the decrease of the diameter of the cylindrical pipeline.

关 键 词：排空作用的耦合效应 接受率方法 MONTE CARLO模拟 

分 类 号：O469[理学—凝聚态物理]