250 µm long anodic TiO2 nanotubes with hexagonal self‐ordering
Authors: Sergiu P Albu Andrei Ghicov Jan M Macak Patrik Schmuki
Institution: 1. University of Erlangen‐Nuremberg, Department of Materials Science, WWIV‐LKO, Erlangen, Germany;2. University of Erlangen‐Nuremberg, Department of Materials Science, WWIV‐LKO, Erlangen, GermanyPhone: +49‐9131‐852‐7575, Fax: +49‐9131‐852‐7582
Abstract: In this work we show that the growth of more than 250 µm thick self‐organized TiO2 nanotube layers is possible, using an electrochemical approach in organic electrolytes. The tubes can grow as a hexagonal close packed pore array. Crucial parameters that decide on the dimensions are the fluoride ion concentration, the voltage and the anodization time. Self‐organized tube formation is restricted to a critical parameter range. Highest aspect ratio tubes can be achieved under a set of very optimized conditions. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Keywords: 61 46 Fg 81 07 De 81 16 Dn 82 45 Yz