Surface-enhanced Raman scattering of SnO_2 bulk material and colloidal solutions (Articolo in rivista)

Type
Label
  • Surface-enhanced Raman scattering of SnO_2 bulk material and colloidal solutions (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.85.195423 (literal)
Alternative label
  • E. Fazio, F. Neri, S. Savasta, S. Spadaro S. Trusso (2012)
    Surface-enhanced Raman scattering of SnO_2 bulk material and colloidal solutions
    in Physical review. B, Condensed matter and materials physics (Online); APS, American physical society, College Park, MD (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • E. Fazio, F. Neri, S. Savasta, S. Spadaro S. Trusso (literal)
Pagina inizio
  • 195423-1 (literal)
Pagina fine
  • 195423-7 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 85 (literal)
Rivista
Note
  • Scopus (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Dipartimento di Fisica della Materia e Ingegneria Elettronica, Universita degli Studi di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy; Advanced and Nano Materials Research s.r.l., Viale F. Stagno d'Alcontres 31, I-98166 Messina, Italy; CNR-IPCF Istituto per i Processi Chimico-Fisici, Viale F. Stagno d'Alcontres 37, 98158 Messina, Italy; (literal)
Titolo
  • Surface-enhanced Raman scattering of SnO_2 bulk material and colloidal solutions (literal)
Abstract
  • Surface-enhanced Raman scattering (SERS) effects on tin dioxide in the form of bulk material, nanostructured thin films, and colloidal solutions were investigated. Raman spectra are characterized by the three Raman scattering peaks at 478, 633, and 776 cm(-1), assigned to the E-g, A(1g), and B-2g modes, typical of rutile SnO2. In the presence of the silver nanoparticles, in addition to the enhancement intensity of some of the fundamental tin dioxide rutile Raman features, the appearance of a new Raman scattering peak at about 600 cm(-1) is observed. These spectral features are observed, in the presence of silver nanoparticles, also in other SnO2-based systems such as pulsed laser deposited thin films, with different stoichiometry, and in water colloidal solutions. The observed SERS effects are explained in terms of electric field gradient mechanism that are generated near a metal surface. In particular, the appearance of a peak near 600 cm(-1) is attributed to the Raman activation of the infrared E-u transverse optical mode. (literal)
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