Alumina Membrane with Hour-Glass Shaped Nanochannels: Tunable Ionic Current Rectification Device Modulated by Ions Gradient
Figure 5
Ionic rectification ratio of the hour-glass shaped alumina nanochannels measured in 1 mM KCl with a series of pH gradients. (a) 4.5 and varied from 4.5 to 11.0. (b) 10.5 and varied from 3.6 to 10.5. With the increasing of pH gradient, the rectification ratios correspondingly increased.
