OICC Press International Nano Letters 2228-5326 3 1 (December 2013) 2013 03 06 Spray-pyrolized nanostructured CuO thin films for H2S gas sensor 10.1186/2228-5326-3-12 EN Ramesh H Bari Nanomaterials Research Laboratory, Department of Physics, G. D. M. Arts, K. R. N. Commerce and M.D. Science College, Jamner, Maharashtra, 424 206, IN Sharad B Patil Nanomaterials Research Laboratory, Department of Physics, G. D. M. Arts, K. R. N. Commerce and M.D. Science College, Jamner, Maharashtra, 424 206, IN Anil R Bari Department of Physics, Arts, Commerce and Science College, Bodwad, Maharashtra, 425 310, IN Journal Article 2013 03 06 Abstract Nanostructured copper oxide (CuO) thin films were prepared by spray pyrolysis technique. X-ray diffraction was used to investigate the structural properties. Surface morphology was studied using scanning electron microscopy. Microstructure was studied using a transmission electron microscope, and energy-dispersive X-ray analysis was used to determine the elemental composition of prepared nanostructured CuO thin film. Gas-sensing performance was conducted using static gas-sensing system, at different operating temperatures in the range of 200°C to 400°C for the gas concentration of 100 ppm. The maximum sensitivity ( S = 872) to H 2 S was found at the temperature of 250°C. Quick response (2 s) and fast recovery (5 s) are the main features of this film.