You can get the concept of: Electrochemical double layer, the Helmholtz equation (Smoluchovskogo), Electro, interface.
Principle: Electrical potential (zeta potential) are being formed at the boundary "solid - liquid" and is the cause of the electrokinetic phenomena. When an electric field to a system consisting of fine solid and liquid, there is a mechanical movement phases. This phenomenon is called electroosmosis. The fluid motion can be set using an accurate gauge.
