Reversal current observed in micro- and submicro-channel flow under non-continuous DC electric field

Duan Yi-fei¹, Ma Hong-wei¹, Gao Ze-yang¹, Wang Kai-ge^{1, †}, Zhao Wei^{1, 2}, Sun Dan¹, Wang Gui-ren², Li Jun-jie³, Bai Jin-tao¹, Gu Chang-zhi³

(color online) Current value curve with time, 0.05-M KCl solution, pH = 7, diameter of channel . (a) The current decays with time. Pausing about 2 minutes between 10 mV and 20 mV, and 20 mV and 40 mV. (b) The relationship between steady state current and external applied voltage. The solid line is curve fitted.