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ACS Appl Mater Interfaces. 2015 Aug 26;7(33):18638-49. doi: 10.1021/acsami.5b05081. Epub 2015 Aug 14.

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

Author information

1
SIX Research Centre, Brno University of Technology , 601 90 Brno, Czech Republic.
2
Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC) , 08193 Cerdanyola, Barcelona, Spain.

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.

KEYWORDS:

AACVD; ferric oxide; flexible gas sensors; toluene; tungsten oxide

PMID:
26251867
DOI:
10.1021/acsami.5b05081

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