Figure 3From: Multi-electrolyte-step anodic aluminum oxide method for the fabrication of self-organized nanochannel arraysSEM images of AAO nanochannels after different steps and applied voltages. (a) 100 V, one-step; (b) 100 V, five-step; (c) 120 V, one-step; (d) 120 V, five-step; (e) 140 V, one-step; and (f) 140 V, five-step.Back to article page