Figure 5From: Fabrication of ordered nanoporous anodic alumina prepatterned by mold-assisted chemical etching AFM and SEM images of Al prepattern and AAO (a, b) Al prepattern featuring a second grating on a primary structure with ~85° rotation and pitch of 277 nm. (c, d) prepattern-induced regular AAO array. Anodization conducted in 0.3 M H3PO4 at 110 V and 5°C.Back to article page