带电胶体系统中的排空作用  

Depletion interactions in charged colloidal system

作　　者：李春树[1] 肖长明[1] 

机构地区：[1]湖南师范大学物理系

出　　处：《物理学报》2007年第4期2434-2441,共8页Acta Physica Sinica

基　　金：湖南省教育厅科研计划(批准号:06B057;04C512);国家自然科学基金(批准号:10375024)资助的课题.~~

摘　　要：用MonteCarlo模拟研究弱带电胶体系统的性质.在四维超球面欧氏空间中严格表示库仑作用的基础上,通过接受率法计算带电胶球间的排空势和排空力.研究了受限于两块平行带电平板之间、淹没于带电小胶球之中的一个或两个带电大胶球系统的排空作用,并通过与不带电的硬球系统相应结果的分析、对比,发现静电势能增强带电胶球之间的排空作用.The weakly charged colloidal system consisting of one or two charged large-spheres immersed in charged small-spheres confined between two charged plates are studied through Monte Carlo simulation. The electrostatic energy of the system is analytically calculated using the hyper-sphere method, and the depletion interactions between the charged large-sphere and the charged plate, and that between two charged large-spheres, are obtained using the acceptance ratio method. Compared with the corresponding uncharged hard sphere systems, it is found that, in the charged systems, the depletion forces between the charged spheres and the two charged plates are strengthened by the electrostatic interactions.

关 键 词：超球面法 接受率方法 排空作用 MONTE CARLO模拟 

分 类 号：O441[理学—电磁学]