Figure 3From: Effect of the anodization voltage on the pore-widening rate of nanoporous anodic aluminaSet of ESEM images of the as-anodized NAA fabricated with different applied voltages. (a) 20, (b) 30, (c) 40, and (d) 50 V. All the samples were obtained after 10 min of anodization.Back to article page