Fig. 3. (a) Gas sensing performances of RGOEY-1, RGOEY-2, FRGOEY-1, and FRGOEY-2 exposed to 0.5 ppm, 1.0 ppm, 5.0 ppm, and 10.0 ppm NO2 gas at room temperature under wet conditions. (b) Gas sensing performances of RGOEY-1, RGOEY-2, FRGOEY-1, and FRGOEY-2 exposed to 5.0 ppm NO2 gas under dry air, 57% RH, 83% RH, and wet conditions.
