title: Nanostructured TiO2-based gas sensors with enhanced sensitivity to reducing gases.
abstract: 2D TiO2thin films and 3D flower-like TiO2-based nanostructures, also decorated with SnO2, were prepared by chemical and thermal oxidation of Ti substrates, respectively. The crystal structure, morphology and gas sensing properties of the TiO2-based sensing materials were investigated. 2D TiO2thin films crystallized mainly in the form of rutile, while the flower-like 3D nanostructures as anatase. The sensor based on the 2D TiO2showed the best performance for H2detection, while the flower-like 3D nanostructures exhibited enhanced selectivity to CO(CH3)2after sensitization by SnO2nanoparticles. The sensor response time was of the order of several seconds. Their fast response, high sensitivity to selected gas species, improved selectivity and stability suggest that the SnO2-decorated flower-like 3D nanostructures are a promising material for application as an acetone sensor.
authors.affiliation: AGH University of Science and Technology, Faculty of Computer Science, Electronics and Telecommunications, al. A. Mickiewicza 30, Krakow 30-059, Poland.
authors.forename: Wojciech
authors.initials: W
authors.lastname: Maziarz
authors.affiliation: AGH University of Science and Technology, Faculty of Materials Science and Ceramics, al. A. Mickiewicza 30, Krakow 30-059, Poland.
authors.forename: Anna
authors.initials: A
authors.lastname: Kusior
authors.affiliation: AGH University of Science and Technology, Faculty of Materials Science and Ceramics, al. A. Mickiewicza 30, Krakow 30-059, Poland.
authors.forename: Anita
authors.initials: A
authors.lastname: Trenczek-Zajac
keywords: acetone; flower-like 3D nanostructures; gas sensors; selectivity; titanium dioxide