“…Nanosphere-shaped materials such as Zn 2 SnO 4 , monodispersed indium tungsten oxide, Ag@In 2 O 3 , ZnSnO 3 , ZnO, and α-Fe 2 O 3 were effectively applied in the discrimination of alcoholic vapors as presented in Table 2 [ 202 , 203 , 204 , 205 , 206 , 207 ]. Wherein, Zn 2 SnO 4 NSPs, and Ag@In 2 O 3 core-shell NSPs [ 202 , 204 ] were found to be effective in detecting the ethanol with sensor response of 23.4 and 72.56 (for 50 ppm ethanol at 180 °C and 220 °C, individually) with response/recovery time of <1 min and LODs of ~5 ppm and ~2 ppm, correspondingly. Similarly, monodispersed indium tungsten oxide ellipsoidal NSPs and α-Fe 2 O 3 hollow NSPs [ 203 , 207 ] were engaged in the quantitation of methanol at higher working temperature (>250 °C).…”