Enhanced sensing properties of ZnO-SnO2 based composite type gas sensor Biplob Mondal, Jayoti Das, Chirosree Roychaudhuri, Nillohit Mukharjee and Hiranmay Saha Eur. Phys. J. Appl. Phys., 73 1 (2016) 10301 Published online: 13 January 2016 DOI: 10.1051/epjap/2015150161