화학공학소재연구정보센터
Applied Surface Science, Vol.258, No.1, 586-589, 2011
Ultrasound-assisted anodization of aluminum in oxalic acid
Porous anodic alumina is an important nanoscale template for fabrication of various nanostructures. We report a new ultrasound-assisted anodization process in oxalic acid. Under the continuous irradiation of ultrasound, the one-step-anodized sample has a smooth and clean surface, and two-step-anodization brings ordered porous anodic alumina with higher growth rate of 52 mu m/h. The ultrasound applied during the anodization can clean the surface and enhance the nanopore growth since it can accelerate the oxide dissolving on the electrolyte/oxide interface. The ultrasound-assisted anodization may be utilized for other anodizations. (C) 2011 Elsevier B.V. All rights reserved.