Electrical and gas-sensitive properties of a SnO$_2$-based nanocomposite with multiwalled carbon nanotubes

This paper presents the results of study of the electrophysical and gas-sensitive properties of a SnO$_2$-based film nanocomposite with the addition of multiwalled carbon nanotubes (to 7 wt%), produced by the hydrolysis of aqueous-alcoholic solutions of tin salts. The dependences of the free carrier mobility and concentration on the number of nanotubes in the composite, and the temperature dependences of the gas sensitivity to ethanol, acetone, and propanol vapors in air are studied. It is shown that the gas sensitivity of the nanocomposite containing $\sim$1.75 wt% of nanotubes is 10–15 times higher in comparison with that of the pure SnO$_2$ film.