Electrical and noise responses of the ink-printed MoS2-based gas sensor for sensing of NO2, NH3 and C3H6O under UV light (275 nm)

This data set consists of DC data, low-frequency noise spectra data and UV-vis spectroscopy data collected for ink-printed MoS2-based resistive sensors (2D MoS2 overlapping flakes creating a continuous layer on the ceramic substrate). The sensors were investigated toward three target gases - nitrogen dioxide (1-10 ppm), ammonia (2-12 ppm) and acetone (2-12 ppm) and sensing responses were recorded under UV light (275 nm) assistance for enhanced detection. The sensing responses consist of DC current/resistance responses and noise responses in the low-frequency range, that show the dependence between electrical and noise features and concentration of selected gases. 
UV light assistance affected high responsivity of MoS2 flakes to NO2 via DC resistance changes and superior sensitivity to NH3 was obtained from the low-frequency noise spectra. Detection limit obtained after subtracting the drifting baseline waso 80 ppb, 130 ppb, and 360 ppb for NO2, NH3, and C3H6O, respectively. The noise responses for NO2 and NH3 were opposite and even higher than DC resistance responses (an increase of 50% for 10 ppm of NO2 and an increase of more than 600% for 12 ppm of NH3), showing the potential of utilizing combined measurement methodology of collecting DC resistance responses and noise responses.