Fig. 1From: Sustained, Controlled and Stimuli-Responsive Drug Release Systems Based on Nanoporous Anodic Alumina with Layer-by-Layer PolyelectrolyteSchematic representation of the alumina pores formation during the anodization process. a The electopolishing procedure creates a plane surface. b The first anodization followed by the dissolution of the alumina wall creates an ordered pattern in the aluminum sheet. c The second anodization on the patterned aluminum creates a perfect ordered NAABack to article page