title: Nanoscale Heterostructures Based on Fe2O3@WO3-x Nanoneedles and Their Direct Integration into Flexible Transducing Platforms for Toluene Sensing.
abstract: Nanoscale heterostructures based on WO3-x nanoneedles functionalized with Fe2O3 nanoparticles are integrated directly into flexible polymer-based transducing platforms via aerosol-assisted chemical vapor deposition. Results demonstrate that the incorporation of Fe2O3 nanoparticles at the surface of WO3-x nanoneedles enhances the electronic and sensing properties of WO3-x, providing a 6-fold increase in sensitivity to toluene and low cross-sensitivity to hydrogen and ethanol. These enhanced-sensing properties are comparable to those obtained via functionalization with precious metal (Pt) nanoparticles, which are commonly used to enhance sensor performance.
authors.affiliation: SIX Research Centre, Brno University of Technology , 601 90 Brno, Czech Republic.
authors.forename: Stella
authors.initials: S
authors.lastname: Vallejos
authors.affiliation: Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC) , 08193 Cerdanyola, Barcelona, Spain.
authors.forename: Isabel
authors.initials: I
authors.lastname: Gràcia
authors.affiliation: Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC) , 08193 Cerdanyola, Barcelona, Spain.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Figueras
authors.affiliation: Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC) , 08193 Cerdanyola, Barcelona, Spain.
authors.forename: Carles
authors.initials: C
authors.lastname: Cané
keywords: AACVD; ferric oxide; flexible gas sensors; toluene; tungsten oxide