SEM micrographs of anodization sample (a) alumina pores obtained from aluminum foils. (b) alumina pores grown in the 1D grating-patterned area. (c) alumina pores grown in the unpatterned area. Anodization conducted in 0.3 M H3PO4 at 110 V and 5°C.
Lai et al. Nanoscale Research Letters 2011 6:157 doi:10.1186/1556-276X-6-157