A simple approach for synthesis of TiO2 nanotubes with through-hole morphology

The present work reports a simple approach for fabrication of self-standing titania (TiO2) nanotube membranes with through-hole morphology. The method is hydrofluoric acid free and the pore opening of TiO2 nanotubes is performed by electrochemical thinning of the oxide barrier layer. A reduction of anodization voltage was applied at the end of the anodization process to cause a successful removal of the remaining barrier layer from the TiO2 nanotubes during their detachment from the underlying titanium substrate. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim