Preparation of radial and longitudinal nanosized heterostructures of In2O3 and SnO2 (Articolo in rivista)

Type
Label
  • Preparation of radial and longitudinal nanosized heterostructures of In2O3 and SnO2 (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/nl071339n (literal)
Alternative label
  • Vomiero, A.; Ferroni, M.; Comini, E.; Faglia, G.; Sberveglieri, G. (2007)
    Preparation of radial and longitudinal nanosized heterostructures of In2O3 and SnO2
    in Nano letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Vomiero, A.; Ferroni, M.; Comini, E.; Faglia, G.; Sberveglieri, G. (literal)
Pagina inizio
  • 3553 (literal)
Pagina fine
  • 3558 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 7 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 12 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • INFM-CNR Sensor Lab, Via Valotti 9, 25133 Brescia, Italy and Department of Chemistry and Physics for Engineering and Materials, University of Brescia, Via Valotti 9, 25133 Brescia, Italy (literal)
Titolo
  • Preparation of radial and longitudinal nanosized heterostructures of In2O3 and SnO2 (literal)
Abstract
  • Radial and longitudinal nanosized In2O3-SnO2 heterostructures were produced by applying a suitable methodology of transport and condensation. Sequential evaporation-condensation over In-seeded alumina promotes the formation of a radial heterostructure, driven by the direct vapor-solid growth mechanism. The single-crystalline In2O3 nanowire nucleates and acts as the backbone for condensation of a polycrystalline SnO2 sheath. Fabrication of longitudinal heterostructures over sapphire is achieved through the application of a nanosized gold catalyst: the gold particles promote nucleation according to the vapor-liquid-solid mechanism, and lead to the formation of single-crystalline In2O3 nanowires with a gold droplet at the apex. Gold maintains its catalytic activity even during subsequent evaporation of SnO2.and induces the nucleation of a SnO2 single-crystal nanowire from the termination of an In2O3 nanowire. The electrical characterization of the longitudinally assembled In2O3-SnO2 structure highlighted a peculiar behavior, as the heterojunction of two n-type semiconducting oxides was revealed, tin oxide being reversely biased. These results hold great potential for the application of precisely shaped heterojunctions. (literal)
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