Flexible SnO₂/MWCNT sensor detecting low concentrations of hydrogen peroxide vapors

A flexible gas sensor based on the SnO₂/MWCNT (Multi-Walled Carbon Nanotube) structure was developed in this work. The results of the investigations of the gas sensing characteristics of the prepared SnO₂/MWCNT sensor to hydrogen peroxide vapors at different operating temperatures were presented. The thickness of the sensitive film was measured and it was about 75 nm. The sensor showed sensitive to hydrogen peroxide vapors starting at room temperature. The resistance of the sensitive layer in the presence of 4.4 ppm hydrogen peroxide vapor increased more than 22 times at 25℃. At this concentration of hydrogen peroxide vapor, the maximum sensitivity value was observed at 75℃, where the sensor resistance increased approximately 50 times