Influence of the anodization conditions and chemical treatment on the formation of alumina membranes with defined pore diameters

Abstract Porous anodic aluminum oxide membranes were fabricated via two-step anodization of in 0.3 M H 2 C O 4 , SO and 0.17 3 PO solutions. The parameters the film such as: pore diameter (D p ), interpore distance c porosity (P) density (ρ) can be completely controlled by operating conditions anodization. Additionally, diameters a chemical treatment (pore opening/widening process). effect anodizing as applied voltage, type electrolyte purity substrate on rate porous growth are discussed. obtained results compared with theoretical predictions data that has been reported literature. influence duration etching structural features was studied. On based qualitative quantitative FFT analyzes circularity maps, it found nanostructures anodized have maximum order under certain specified conditions. presence alloying elements affects not only but also morphology oxide. depends temperature. During films increases widening time highest observed phosphoric acid solution.