P1.0.9 Spectroscopic and electrical evidence of transition to nanostructured behaviour in SnO2

A. Giberti, V. Guidi & C. Malag├╣
SnO2 sensors with two different average grain size showed diverse behaviors through electrical and spectroscopic characterizations. In the case of direct current electrical responses, the increase in conductance for the same temperature rise was, on average, about three times larger for larger grained samples. Impedance spectroscopic plots were obtained in dry air and were fitted with the same equivalent circuit for the two granulometries, showing important differences in the fitting parameters. The two techniques present...