Effect of temperature and humidity on the sensing performance of TiO₂ nanowire-based ethanol vapor sensors

Abstract In this paper, we study the influence of two key factors, temperature, and humidity, on gas sensors based titanium dioxide nanowires synthesized at 4 different temperatures with morphology. The samples’ structure are investigated using SEM, XRD FTIR analysis. effects humidity temperature studied by measuring resistance response when exposed to ethanol. At room observed a 15% sensitivity 100 ppm ethanol vapor increasing operating up 180 °C, is enhanced orders magnitude. best for highest found be around °C. Also, it was that every nanowire morphology has its own optimum temperature. increased higher Relative Humidity (RH). Besides, experiences gradual increase RH rises from 10% 60%. On other hand, 60% 90% decreases gradually due mechanisms interaction TiO 2 H O molecules.