ABSTRACT
Most classical works on electrophoresis are for individual particles that are uniformly charged [1]. In practice these conditions are often not met, and so the purpose of this chapter is to summarize recent theoretical and experimental results for nonuniformly charged particles and interacting particles (see Fig. 1). Several of the theoretical results might seem counterintuitive at first; however, many are supported by experimental data [2-5]. This empowers the electrokinetic results in this chapter to be used for a variety of important new analytical applications, including measurements of colloidal forces and charge distributions on individual particles [4, 6]. A new experimental technique to deter mine forces between coagulated particles, “differential electrophoresis,” has been devel oped using the concepts presented here [5].
