Modulated TiO2 nanotube stacks and their use in interference sensors

In the present work we control wall thickness oscillations in electrochemically grown TiO2 nanotube arrays by defined water additions to an organic anodization electrolyte. Such corrugated TiO2 nanotubes can be used to build optimized optical stacks that show under white light illumination well defined interference patterns which can be used as a self-cleaning platform for label-free sensing applications. (C) 2010 Elsevier B.V. All rights reserved.