title: Aerosol assisted chemical vapour deposition of gas sensitive SnO2 and Au-functionalised SnO2 nanorods via a non-catalysed vapour solid (VS) mechanism.
abstract: Tin oxide nanorods (NRs) are vapour synthesised at relatively lower temperatures than previously reported and without the need for substrate pre-treatment, via a vapour-solid mechanism enabled using an aerosol-assisted chemical vapour deposition method. Results demonstrate that the growth of SnO2 NRs is promoted by a compression of the nucleation rate parallel to the substrate and a decrease of the energy barrier for growth perpendicular to the substrate, which are controlled via the deposition conditions. This method provides both single-step formation of the SnO2 NRs and their integration with silicon micromachined platforms, but also allows for in-situ functionalization of the NRs with gold nanoparticles via co-deposition with a gold precursor. The functional properties are demonstrated for gas sensing, with microsensors using functionalised NRs demonstrating enhanced sensing properties towards H2 compared to those based on non-functionalised NRs.
authors.affiliation: SIX Research Centre, Brno University of Technology, Technická 10, Brno, CZ-61600, Czech Republic.
authors.forename: Stella
authors.initials: S
authors.lastname: Vallejos
authors.affiliation: Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
authors.forename: Soultana
authors.initials: S
authors.lastname: Selina
authors.affiliation: MINOS-EMaS, Departament d'Enginyeria Electrònica, Universitat Rovira i Virgili, Paisos Catalans 26, Tarragona, 43007, Spain.|Aix Marseille Université, CNRS, Université de Toulon, IM2NP UMR 7334, Marseille, France.
authors.forename: Fatima Ezahra
authors.initials: FE
authors.lastname: Annanouch
authors.affiliation: Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Campus UAB, Barcelona, 08193, Spain.
authors.forename: Isabel
authors.initials: I
authors.lastname: Gràcia
authors.affiliation: MINOS-EMaS, Departament d'Enginyeria Electrònica, Universitat Rovira i Virgili, Paisos Catalans 26, Tarragona, 43007, Spain.
authors.forename: Eduard
authors.initials: E
authors.lastname: Llobet
authors.affiliation: Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
authors.forename: Chris
authors.initials: C
authors.lastname: Blackman