Fig. 5

a, b Response and recovery time of the sensors based on reduced graphene oxide incorporated SnO₂ nanospheres to 4 ppm of decane and decane at 125 °C. c, d Reproducibility and long-term stability of the sensors based on reduced graphene oxide incorporated SnO₂ nanospheres to 4 ppm of decane and heptane at 125 °C. e Effect of humidity on the sensing response of the sensors based on reduced graphene oxide incorporated SnO₂ nanospheres to 4 ppm of decane and heptane at 125 °C to 5 ppm. Selectivity of the fabricated sensor toward different target gas such as heptane, decane, hydrogen, carbon monoxide, acetone, ethanol, and methanol