Highly ordered nanoporous Ta2O5 formed by anodization of Ta at high temperatures in a glycerol/phosphate electrolyte

In the present work, we investigate the anodization of Ta in a K2HO4 containing glycerol electrolyte at elevated temperatures (180 degrees C). Under optimized conditions, uniformly over the entire anodized surface, self-organized porous Ta2O5 structures can be formed, that consist of highly aligned pores of 25 nm diameter and several tens of micrometers in length. (C) 2011 Elsevier B.V. All rights reserved.