Theory of Electrorotation of Clustered Colloidal Particles  

作　　者：LIURen-Ming HUANGJi-Ping 

机构地区：[1]DepartmentofPhysics,HuaiyinTeachersCollege,Huaiyin223001,China [2]DepartmentofPhysics,theChineseUniversityofHongKong,Shatin,NT,HongKong,China／／MaxPlanckInstituteforPolymerResearch,Ackermannweg10,55128,Mainz,Germany

出　　处：《Communications in Theoretical Physics》2005年第4期765-768,共4页理论物理通讯（英文版）

基　　金：亚历山大·冯·洪堡研究奖学金

摘　　要：When a colloidal suspension is exposed to a strong rotating electric field, an aggregation of the suspended particles is induced to appear. In such clusters, the separation between the suspended particles is so close that one could not neglect the multiple image effect on the electrorotation (ER) spectrum. Since so far the exact multiple image method exists in two dimensions only, rather than in three dimensions, we investigate the ER spectrum of the clustered colloidal particles in two dimensions, in which many cylindrical particles are randomly distributed in a sheet cluster. We report the dependence of the ER spectrum on the materialparameters. It is shown that the multiple image method predicts two characteristic frequencies, at which the rotation speed reaches maximum. To this end, the multiple image method is numerically demonstrated to be in good agreement with the known Maxwell-Garnett approximation.

关 键 词：ELECTROROTATION colloidal particles 

分 类 号：O561[理学—原子与分子物理]