Utilize este identificador para referenciar este registo:
http://hdl.handle.net/10773/5519
Título: | Structural, optical and magnetic resonance properties of TiO2 fibres grown by laser floating zone technique |
Autor: | Rodrigues, Joana Peres, Marco Fernandes, António Graça, Manuel Sobolev, Nicolai Costa, Florinda Monteiro, Teresa |
Palavras-chave: | EPR LFZ PL TiO2 |
Data: | 2011 |
Editora: | Elsevier |
Resumo: | TiO2 fibres grown by the laser floating zone technique show the rutile crystalline phase as identified by X-ray diffraction and Raman spectroscopy. Scanning electron microscopy evidences a uniform surface, free of inclusions and without low-angle grain boundaries and bubbles. At low temperatures, the fibres luminescence is dominated by a richly structured optical centre with two well-defined zero-phonon lines at 1.579 eV and 1.574 eV followed by an intense vibronic sideband with a maximum close to 1.47 eV. Electron paramagnetic resonance revealed that substitutional chromium and iron ions are present as contaminants in the grown fibres, alongside with Ti3+ interstitials and other structural defects. The chemical nature of the defect responsible for the structured near-infrared luminescence is discussed. |
Descrição: | Partilhar documento na coleção da comunidade Laboratório Associado I3N |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/5519 |
ISSN: | 0169-4332 |
Aparece nas coleções: | DFis - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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2012_Applied-Surface-Science.pdf | versão pdf do editor (em impressão) | 891.13 kB | Adobe PDF |
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