Fig. 3: Gas-sensing properties of sensors based on pure and NiO-decorated SnO nanosheets.
From: NiO nanoparticle-decorated SnO2 nanosheets for ethanol sensing with enhanced moisture resistance
a Responses of the sensors based on pure and NiO-decorated SnO2 nanosheets to 100 ppm ethanol at different temperatures (200‒320 °C); b the responses of the sensors based on pure SnO2 and SnO2-3Ni nanosheets to various ethanol concentrations (5‒10,000 ppm) at 260 °C, where the inset shows the response at low concentrations (5–100 ppm); c typical response-recovery curves of the sensors to ethanol correspond to the inset of (b); d selectivity of the sensors to 100 ppm gases at 260 °C; e the response curve of SnO2-3Ni based sensor to 50 ppm ethanol at 260 °C (four cycles); f long-term stability of the sensors to 100 ppm ethanol at 260 °C for 4 weeks
