Defect study of SnO2 nanostructures by cathodoluminescence analysis: Application to nanowires (Articolo in rivista)

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  • Defect study of SnO2 nanostructures by cathodoluminescence analysis: Application to nanowires (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.snb.2006.10.014 (literal)
Alternative label
  • Prades, JD (a); Arbiol, J (a)(b); Cirera, A (a); Morante, JR (a); Avella, M (c); Zanotti, L (d); Comini, E (e); Faglia, G (e); Sberveglieri, G (e) (2007)
    Defect study of SnO2 nanostructures by cathodoluminescence analysis: Application to nanowires
    in Sensors and actuators. B, Chemical (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Prades, JD (a); Arbiol, J (a)(b); Cirera, A (a); Morante, JR (a); Avella, M (c); Zanotti, L (d); Comini, E (e); Faglia, G (e); Sberveglieri, G (e) (literal)
Pagina inizio
  • 6 (literal)
Pagina fine
  • 12 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 126 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • a EME, CeRMAE, IN2UB, C/ Martí i Franquès, 1, E-08028 Barcelona, Spain b TEM-MAT, Serveis Cientificotècnics, Universitat de Barcelona, C/ Martí i Franques 1, E-08028 Barcelona, Spain c Departamento de Física de la Materia Condensada, Universidad de Valladolid, Paseo Prado la Magdalena s/n Valladolid, Spain d IMEM-CNR, Parco Area delle Scienze 37/A, 43010 Fontanini, Parma, Italy e Sensor Lab., INFM, Brescia University, Via Valotti 9, 25133 Brescia, Italy (literal)
Titolo
  • Defect study of SnO2 nanostructures by cathodoluminescence analysis: Application to nanowires (literal)
Abstract
  • Defects in SnO2 nanowires have been studied by cathodoluminescence, and the obtained spectra have been compared with those measured on SnO2 nanocrystals of different sizes in order to reveal information about point defects not determined by other characterization techniques. Dependence of the luminescence bands on the thermal treatment temperatures and pre-treatment conditions have been determined pointing out their possible relation, due to the used treatment conditions, with the oxygen vacancy concentration. To explain these cathodoluminescence spectra and their behavior. a model based on first-principles calculations of the surface oxygen vacancies in the different crystallographic directions is proposed for corroborating the existence of surface state bands localized at energy values compatible with the found cathodoluminescence bands and with the gas sensing mechanisms. CL bands centered at 1.90 and 2.20 eV are attributed to the surface oxygen vacancies 100 degrees coordinated with tin atoms, whereas CL bands centered at 2.37 and 2.75 eV are related to the surface oxygen vacancies 130 degrees coordinated. This combined process of cathodoluminescence and ab initio calculations is shown to be a powerful tool for nanowire defect analysis. (C) 2006 Elsevier B.V. All rights reserved. (literal)
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