Micromixers are often vital components for lab-on-a-chip devices,because mixing is required for the detection/analysis of chemical or biochemical content [1].The flow of liquids containing dissolved ions under the influence of electrical body forces is known as electroosmosis [2]; it is one of the most common nonmechanical means for achieving chaotic advection in microfluidics,which can provide an effective increase of the interfacial contact area [3,4] and then induce an effective mixing.