Flexible gas sensing devices with directly grown tungsten oxide nanoneedles via AACVD

Flexible gas sensing devices have been fabricated by directly integrating multilayer polymer-based platforms and highly crystalline tungsten oxide nanoneedles grown via aerosol-assisted chemical vapor deposition (AACVD). Thermal simulations and characterization of the heating element demonstrate these devices provide uniform temperature distribution at the sensing active area and gas sensing tests show repeatable and satisfactory responses towards hydrogen and ethanol. These devices go beyond traditional gas sensors, offering flexibility and functionality, with a fabrication method that provides great advantages for the integration of nanomaterials and flexible platforms and that can be used in a cost effective production for large-scale applications.