Recently, both EP and DEP have captured much interest because they are effective ways to trap, move, deform and separate particles ranging from colloidals to DNA strands and biological cells (Huang, Y; Ewalt, K. L; et al; ???Electric Manipulation of Bioparticles and Macromolecules on Microfabricated electrodes???, Anal Chem, 73, pp. 1549-1559, (2001)).