title: Nanopowder Metal Oxide for Photoluminescent Gas Sensing.
abstract: Gas sensing properties of metal oxide nanopowders (ZnO, TiO2, WO3, SnO2) with average diameters of 40-60 nm were analyzed by room-temperature photoluminescence spectroscopy. The influence of gas environment (O2, N2, H2, CO, CO2) on the emission intensity was investigated for metal oxide nanopowders with surface doped by impurities (Pt, Ag, Au, Sn, Ni or Cu). Established physicochemical regularities of modification of surface electronic states of initial and doped nanopowders during gas adsorption. The nature of metal oxide nanopowder gas-sensing properties (adsorption capacity, sensitivity, selectivity) has been established and the design and optimal materials for the construction of the multi-component sensing matrix have been selected.
authors.affiliation: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NASU, Naukova Str., 3b, Lviv, 79060, Ukraine.
authors.forename: V M
authors.initials: VM
authors.lastname: Zhyrovetsky
authors.affiliation: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NASU, Naukova Str., 3b, Lviv, 79060, Ukraine. popovych@iapmm.lviv.ua.|National University "Lvivska Polytechnika", Bandera Str., 12, Lviv, 79013, Ukraine. popovych@iapmm.lviv.ua.
authors.forename: D I
authors.initials: DI
authors.lastname: Popovych
authors.affiliation: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NASU, Naukova Str., 3b, Lviv, 79060, Ukraine.
authors.forename: S S
authors.initials: SS
authors.lastname: Savka
authors.affiliation: Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NASU, Naukova Str., 3b, Lviv, 79060, Ukraine.
authors.forename: A S
authors.initials: AS
authors.lastname: Serednytski
keywords: Gas sensor; Metal oxide; Nanopowder; Photoluminescence