Spectroscopic distinction of surface and volume ions in cerium(III)- and terbium(III)-containing core and core/shell nanoparticles
Autor(en): | Koempe, Karsten Lehmann, Olaf Haase, Markus |
Stichwörter: | Chemistry; Chemistry, Physical; LUMINESCENCE; Materials Science; Materials Science, Multidisciplinary; PHOSPHORS | Erscheinungsdatum: | 2006 | Herausgeber: | AMER CHEMICAL SOC | Journal: | CHEMISTRY OF MATERIALS | Volumen: | 18 | Ausgabe: | 18 | Startseite: | 4442 | Seitenende: | 4446 | Zusammenfassung: | Core and core/shell Tb3+-doped CePO4 and LaPO4 nanoparticles have been prepared in an organic solvent mixture. The particles were characterized by X-ray diffraction (XRD), UV-vis absorption spectra, luminescence spectra, and lifetimes. It is shown that the luminescence spectra of Ce3+ and Tb3+ ions at the particle surface differ from those located in the interior of the nanocrystals. The emission of cerium surface ions is red-shifted compared to the emission of ions in the particle center. Tb3+ ions at the surface display strongly broadened emission lines, indicating a variety of different surface sites. |
ISSN: | 08974756 | DOI: | 10.1021/cm060857g |
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geprüft am 12.05.2024