The interaction of nanocrystalline tin oxide and titanium oxide powders with NO2-containing atmosphere has been followed as a function of temperature by Raman spectroscopy. New bands appearing in the 800–1600 cm−1 range have been observed and attributed to various adsorbates. The responsibility of adsorbed nitrites in the sensor resistance change is proposed.
20 Sep 2007
Volume: 126 Issue: 1 Pages: 1-5
Sensors and Actuators B: Chemical