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Resumen: In this work we report the influence of the crystallization stage of the host matrix on the spectroscopic properties of Nd3+ ions in biocompatible glass-ceramic eutectic rods of composition 0.8CaSiO3-0.2Ca3(PO4)2 doped with 1 and 2 wt% of Nd2O3. The samples were obtained by the laser floating zone technique at different growth rates between 50 and 500 mm/h. The microstructural analysis shows that a growth rate increase or a rod diameter decrease leads the system to a structural arrangement from three (two crystalline and one amorphous) to two phases (one crystalline and one amorphous). Electron backscattering diffraction analysis shows the presence of Ca2SiO4 and apatite-like crystalline phases. Site-selective laser spectroscopy in the 4I9/2¿4F3/2/4F5/2 transitions confirms that Nd3+ ions are incorporated in crystalline and amorphous phases in these glass-ceramic samples. In particular, the presence of Ca2SiO4 crystalline phase in the samples grown at low rates, which has an excellent in vitro bioactivity, can be unambiguously identified from the excitation spectra and lifetime measurements of the 4F3/2 state of Nd3+ ions.
Idioma: Inglés
DOI: 10.1364/OE.20.010701
Año: 2012
Publicado en: OPTICS EXPRESS 20, 10 (2012), 10701-10711
ISSN: 1094-4087
Factor impacto JCR: 3.546 (2012)
Categ. JCR: OPTICS rank: 4 / 79 = 0.051 (2012) - Q1 - T1
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CSD2007-00013
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2011-27968
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2009-13979-C03-03
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2009-14282-C02-02
Tipo y forma: Article (Published version)
Área (Departamento): Ciencia de los Materiales e Ingeniería Metalúrgica (Departamento de Ciencia y Tecnología de Materiales y Fluidos)

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Articles > Artículos por área > Ciencia de los Materiales e Ingeniería Metalúrgica