The application of nanotubular titanium dioxide for gas sensors

The work considers possibilities to employ nanotubular (NT) titanium dioxide layers in order to develop gas sensors. The NT TiO2 layers have been fabricated by electrochemical anodizing of Ti foil with subsequent dissolution of metal layer. The technique to apply TiO2 NT layer over the substrate equipped with strip coplanar electrodes is developed. It has been found that the TiO2 NTs exhibit a considerable chemiresistive effect at temperatures over 300 °C versus a number of organic vapors under ppm concentrations in air.