Aerosol-assisted CVD synthesis, characterisation and gas-sensing application of gold-functionalised tungsten oxide
- 1Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
- 2School of Engineering, University of Warwick, Coventry CV4 7AL, UK
- 3Alphasense Ltd, 300 Avenue West, Skyline 120, Great Notley, Essex CM77 7AA, UK
Abstract. Tungsten oxide nanoneedles (NNs) functionalised with gold nanoparticles (NPs) have been integrated with alumina gas-sensor platforms using a simple and effective co-deposition method via aerosol-assisted chemical vapour deposition (AACVD) utilising a novel gold precursor, (NH4)AuCl4. The gas-sensing results show that gold NP functionalisation of tungsten oxide NNs improves the sensitivity of response to ethanol, with sensitivity increasing and response time decreasing with increasing amount of gold.