Authors: D V Portan G C Papanicolaou G Jiga M Caposi
Publish Date: 2012/08/04
Volume: 42, Issue: 12, Pages: 1013-1024
Abstract
In this study a new parameter having influence on the TiO2 nanotubes formation process is reported Except of previously mentioned and wellknown anodizing parameters such as voltage time of anodizing type of electrolyte temperature etc samples’ configuration in the electrochemical cell represents an important factor in the anodizing procedure The electrochemical anodization is a group of interconnected processes and factors each one of them having its specific weight on the final result It was observed that the very short distance in between two titanium plates connected to the anodic terminal of the electrochemical cell is the decisive factor for creating superimposed TiO2 nanotube layers More precisely it was found that the configuration of two parallel Ti plates being in close contact to each other mounted to the anodic terminal and in parallel with the graphite cathode favors the formation through electrolysis of multilayered TiO2 nanotubes The microscopic observation of multilayered TiO2 nanotubes was performed through the removal of the upper layer of nanotubes using sonication This peculiar result was interpreted using existed theories such as First Fick’s law and Nerst diffusion layer in combination with recently published research findings related to the effect of interelectrode distanceWe express our recognition to Prof N Bouropoulos Department of Materials Science University of Patras to Dr Drakopoulos FORTH/ICEHT Institute of the University of Patras for technical support with SEM images and also to Ms T Arvanita for her support in performing the experiments
Keywords: