 |
 |
|
Ciobanu, C. S., Iconaru, S. L., Massuyeau, F., Constantin, L. V., Costescu, A. & Predoi, D. (2012) Synthesis, Structure, and Luminescent Properties of Europium-Doped Hydroxyapatite Nanocrystalline Powders. J. Nanomater. 942801.
Added by: Laurent Cournède (2016-03-10 21:28:40) |
| Type de référence: Article DOI: 10.1155/2012/942801 Numéro d'identification (ISBN etc.): 1687-4110 Clé BibTeX: Ciobanu2012 Voir tous les détails bibliographiques  |
Catégories: IMN Mots-clés: bioapatite, biological probe, cells, Ceramics, fluorapatite, nanoparticles, quantum dots, site preference, yttrium Créateurs: Ciobanu, Constantin, Costescu, Iconaru, Massuyeau, Predoi Collection: J. Nanomater. |
Consultations : 1/544
Indice de consultation : 4% Indice de popularité : 1% |
| Résumé |
|
The luminescent europium-doped hydroxyapatite (Eu:HAp, Ca10-xEux(PO4)(6)(OH)(2)) with 0 {<}= x {<}= 0.2 nanocrystalline powders was synthesized by coprecipitation. The structural, morphological, and textural properties were well characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The vibrational studies were performed by Fourier transform infrared, Raman, and photoluminescence spectroscopies. The X-ray diffraction analysis revealed that hydroxyapatite is the unique crystalline constituent of all the samples, indicating that Eu has been successfully inserted into the HAp lattice. Eu doping inhibits IIAp crystallization, leading to a decrease of the average crystallite size from around 20 nm in the undoped sample to around 7 nm in the sample with the highest Eu concentration. Furthermore, the samples show the characteristic D-5(0) -{>} F-7(0) transition observed at 578 nm related to Eu3+ ions distributed on Ca2+ sites of the apatitic structure.
Added by: Laurent Cournède |