Figure 3
From: Dye-functionalized Sol-gel Matrix on Carbon Nanotubes for Refreshable and Flexible Gas Sensors
Selective and refreshable gas sensing with humidity calibration. (a) Sensing mechanism of a CNT-dye hybrid gas sensor. (b)-i Optical image of the CNT-dye hybrid gas sensor before gas exposure. (b)-ii Optical image of the CNT-dye hybrid gas sensor after SO2 gas exposure. (c) Real-time conductance measurement data obtained from a methyl red-functionalized CNT-dye hybrid gas sensor after the introduction of SO2 gases with varying concentration. (d) Sensor response (ΔG/G0) of a CNT-dye hybrid gas sensor to various concentrations of SO2 gas. More than 5 samples were measured for each data point. (e) Noise characteristics for the bare CNT networks and CNT-dye hybrid gas sensor before and after SO2 gas exposure. (f) Real-time conductance measurement data obtained for a CNT-dye hybrid gas sensor after the introduction of SO2 and NH3 gases. (g) Sensor response (ΔG/G0) of a CNT-dye hybrid gas sensor under varying relative humidity conditions. More than 7 samples were measured for each data point.
