Effect of Humidity on Gas Sensing Performance of Carbon Nanotube Gas Sensors Operated at Room Temperature

Carbon nanotubes (CNTs) have shown promising results for gas sensing due to their high surface area. Since humidity has a great impact on the electrical conductivity of resistive CNT sensors, we investigated change properties. In this study, fabricated vertically aligned CNT-based sensors detection volatile organic compounds. The morphologies and phase structures samples were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD) Fourier-transform infrared spectroscopy (FT-IR), confirming presence with some impurities. It was found that relative increase from 10% 80% can reduce sensor by around 4%. On other hand, above increased slightly. device been used as compounds, cross-sensitivity investigated. in up 40% decrease response studied