Inkjet TiO2-Based Sensors for Environmental Monitoring

This paper described the production of TiO2-based sensors by inkjet printing and investigated their applicability for environmental odour monitoring. Sensing properties of three inkjet TiO2 sensors were tested towards calibrants representative of common environmental gases under controlled conditions. N-butanol, dimethyl-disulphide and trimethylamine were considered. Results achieved proved the sensitivity of innovative sensors towards the calibrants of interest as well as a reproducibility of their responses in accordance with the criterion defined by ISO5725-2:2019 and EN13275-2003 and comparable to the one of commercial sensors for volatile organic compounds. Thus, the proposed inkjet printing technique resulted to be competitive for the fabrication of low-cost and well reproducible TiO2-based sensors.