... Preparation of WO3nanoparticles and application to NO2sensorDan Meng, Toshinari Yamazaki*, Yanbai Shen, Zhifu Liu, Toshio KikutaFaculty of Engineering, University of Toyama, 3190 Gofuku, Toyama ... is toxic and deteriorates the environ-ment through acid rain, photochemical smog, and the production of ozone [1]. Therefore, the development of an NO2gas sensor forenvironmental monitoring ... Kaito et al. [17] applied this method to the formation of metal-oxide nanoparticles, such as WO3, MoO3, etc.;they evaporated various metals in Ar and O2mixture. The first application of the...