Inkjet-Printed RF Gas Sensors based on conductive nanomaterials for VOCs monitoring

This paper proposes an innovative differential sensor based on planar microwave transducers printed on flexible substrate by low-cost printing technologies and operating at ambient temperature. The gas detection is obtained from a differential approach between a reference channel and gas sensitive one based on PEDOT: PSS-MWCNT. A preliminary sensor is fabricated and tested around 3.6 GHz. The experimental behavior in the presence of ethanol vapor is encouraging and validates the proof-of-concept.