Nanoscale Heterostructures Based on Fe2O3@WO3-x Nanoneedles and Their Direct Integration into Flexible Transducing Platforms for Toluene Sensing

• DOI: 10.1021/acsami.5b05081
• Publication Date: 2015-08-07T15:38:40Z
• Authors: Stella Vallejos; Isabel Gràcia; Eduardo Figueras; Carles Cané
• Keywords: flexible gas sensors; ferric oxide; AACVD; toluene; 02 engineering and technology; 0210 nano-technology; tungsten oxide; AACVD; ferric oxide; flexible gas sensors; toluene; tungsten oxide

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 at surface enhances electronic and sensing properties WO3–x, providing a 6-fold increase in sensitivity to toluene low cross-sensitivity hydrogen ethanol. These enhanced-sensing comparable those obtained functionalization precious metal (Pt) nanoparticles, which commonly used enhance sensor performance.