Gas sensors are provided. The gas sensors include a gas sensing element having metal oxide nanoparticles and a thin-film heating element. Systems that include the gas sensors, as well as methods of using the gas sensors, are also provided. Embodiments of the present disclosure find use in a variety of different applications, including detecting whether an analyte is present in a gaseous sample.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH
 This invention was made with government support under Grant No. EEC-0832819 awarded by the National Science Foundation, and under Grant No. DE-AC02-05CH11231, awarded by the Department of Energy. The government has certain rights in the invention.