SH-SAW VOCs sensor based on ink-jet printed MWNTs / polymer nanocomposite films

This study presents Shear Horizontal Surface Acoustic Wave (SH-SAW) sensors based on ink-jet printed poly (3,4-ethylenedioxythiophene) polystyrene sulfonate — multi wall carbon nanotubes (PEDOT:PSS-MWCNTs) and MWNTs-based inks as sensitive gas material. Experiments show the validation of the fabrication process of the acoustic platform and ink-jet printed sensitive layers. The characterization of two devices under different concentrations of ethanol vapor shows promising results in terms of reproducibility of the measurements. A sensitivity of 12H/ppm was recorded with the sensor based on ink-jet printed 600nm thickness sensitive layer.