Numerical and Theoretical Analysis of the Ion Transport Around a Completely Polarizable Electrode Under AC for Use in Microfluidics

It is well known that a solid surface when in contact with an electrolyte shows accumulation of ions (usually anions) at the interface due to some reason. Because of this, the counter ions (cations, in the usual cases) in the electrolyte are attracted to the region very close to the interface between the solid and liquid constituting the EDL (electric double layer). Distribution of ions within EDL depends on the amount of ions adhered on the surface and also the nature of the electrolyte, such as PH and ion concentrations, etc. Figure 1 illustrates the concept sketch of this classical phenomenon.