FIG. 3.

Normalized ion conductivity profile for different bulk media conductivities (perm-selective length of 300 nm and gap width of 40 nm): (a) along the constriction sidewall, and (b) along the constriction centerline. Insets (i)–(iii) show a schematic of how the electrical double layer affects the counter-ion distribution; inset (iv) shows the net electrokinetic enhancement due to ICP effects within media of different bulk conductivities (neglecting electro-osmosis); and inset (v) shows the alteration of the extent of ion depletion when electro-osmosis effects are considered at σ_m of 0.2 S/m.