6.2.1 Inkjet Printed Capacitive Transducers on Flexible Plastic Substrates with Increase Stability: Ag on PET

Ulrike Altenberend, Alexandru Oprea, Nicolae Barsan, Udo Weimar, Nico F. De Rooij, Francisco Molina-Lopez & Danick Briand
Inkjet printed interdigitated transducers have been produced on flexible substrates and optimized for gas sensing applications by improving the sintering conditions and employing additional passivation procedures, like electroplating with Ni or whole transducer passivation through Parylene-C coating. The results of the performed investigations showed that the transducers printed with Ag ink can be used, as prepared, in capacitive gas sensing structures up to 70% relative humidity only. Higher humidity levels resulted in irreversible shifts of...