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http://hdl.handle.net/10773/6101
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DC Field | Value | Language |
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dc.contributor.author | Graça, M.P.F. | pt |
dc.contributor.author | Peres, M. | pt |
dc.contributor.author | Valente, M.A. | pt |
dc.contributor.author | Neves, A.J. | pt |
dc.contributor.author | Monteiro, T. | pt |
dc.date.accessioned | 2012-02-09T14:09:24Z | - |
dc.date.issued | 2008-12 | - |
dc.identifier.issn | 0022-3093 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/6101 | - |
dc.description.abstract | Transparent SiO2:Li2O:Nb2O5 glass doped with Tm3+ has been prepared by the sol–gel method, and heat-treated in air (HT) at temperatures between 500 and 800 °C. X-ray diffraction (XRD) patterns and Raman spectroscopy show SiO2 and LiNbO3 phases in samples HT above 650 °C, and a NbTmO4 phase for T > 750 °C. The XRD SEM analysis show increasing particle size and number with the increase of HT temperature. Intra-4f12 transitions due to Tm3+ ion dispersed in the matrix are observed in samples with T > 650 °C. The luminescence is dominated by the 1G4 → 3F4 (∼650 nm), 1D2 → 3F3 (∼780 nm), 3H4 → 3H6 (∼800 nm), 3H5 → 3H6 (∼1200 nm) and 3H4 → 3F4 (∼1500 nm) transitions under resonant excitation to the ion levels. | pt |
dc.language.iso | eng | pt |
dc.publisher | Elsevier | pt |
dc.relation.uri | http://www.scopus.com/inward/record.url?eid=2-s2.0-55349122880&partnerID=40&md5=f020b7d9c53a97ece3e37d86c08be2a1 | |
dc.rights | restrictedAccess | por |
dc.subject | Crystal growth | pt |
dc.subject | Glass ceramics | pt |
dc.subject | Raman scattering | pt |
dc.subject | X-ray diffraction | pt |
dc.subject | Optical spectroscopy | pt |
dc.subject | Scanning electron microscopy | pt |
dc.subject | LuminescencSilicates | pt |
dc.subject | Sol–gel | pt |
dc.subject | Aerogel and solution chemistry | pt |
dc.title | Structural and optical spectroscopy of LiNbO3:Tm nanocrystals embedded in a SiO2 glass matrix | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.firstPage | 5244 | pt |
degois.publication.issue | 47-51 | pt |
degois.publication.issue | 47-51 | |
degois.publication.lastPage | 5246 | pt |
degois.publication.title | Journal of Non-Crystalline Solids | pt |
degois.publication.volume | 354 | pt |
dc.date.embargo | 10000-01-01 | - |
dc.identifier.doi | 10.1016/j.jnoncrysol.2008.05.084 | * |
Appears in Collections: | DFis - Artigos I3N-FSCOSD - Artigos |
Files in This Item:
File | Description | Size | Format | |
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JNCS.pdf | versão pdf do editor | 415.17 kB | Adobe PDF |
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