Figure 4
From: Dye-functionalized Sol-gel Matrix on Carbon Nanotubes for Refreshable and Flexible Gas Sensors
Tube-shaped gas sensors based on folded CNT sensors. We utilized methyl red-functionalized gas sensors. (a) Optical image of a tube-shaped CNT-dye hybrid gas sensor. (b)-i Optical image of a tube-shaped CNT-dye hybrid gas sensor before SO2 gas exposure. (b)-ii Optical image of a tube-shaped CNT-dye hybrid gas sensor after SO2 gas exposure. The color of the sensor channel was clearly changed from yellow to red. (c) I–V curve of the CNT-dye hybrid gas sensor measured before and during bending. (d) Noise characteristics of the CNT-dye hybrid gas sensor before and during bending. (e) Real-time conductance measurement data obtained for the bent CNT-dye hybrid gas sensor after the introduction of SO2 (10 ppm).
