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Ciobanu, C. S., Andronescu, E., Stoicu, A., Florea, O., Le Coustumer, P., Galaup, S., Djouadi, A., Mevellec, J. Y., Musa, I., Massuyeau, F., Prodan, A. M., Lafdi, K., Trusca, R., Pasuk, I. & Predoi, D. (2011) INFLUENCE OF ANNEALING TREATMENT OF NANO-HYDROXYAPATITE BIOCERAMICS ON THE VIBRATIONAL PROPERTIES. Dig. J. Nanomater. Biostruct. 6 609–624. 
Added by: Laurent Cournède (2016-03-10 21:32:21)
Type de référence: Article
Numéro d'identification (ISBN etc.): 1842-3582
Clé BibTeX: Ciobanu2011b
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Catégories: PCM
Mots-clés: beta-tricalcium phosphate, calcium-phosphate ceramics, coatings, gel-derived hydroxyapatite, Hydroxyapatite, Nanoparticle, Osteoblasts cells, powders, raman-spectroscopy, room-temperature, Sol-gel, spectra, thin-films, time-resolved photoluminescence, Vibrational spectroscopies
Créateurs: Andronescu, Ciobanu, Djouadi, Florea, Galaup, Lafdi, Le Coustumer, Massuyeau, Mevellec, Musa, Pasuk, Predoi, Prodan, Stoicu, Trusca
Collection: Dig. J. Nanomater. Biostruct.
Consultations : 2/459
Indice de consultation : 2%
Indice de popularité : 0.5%
Résumé     
Nano-hydroxyapatite bio-ceramics were synthesized by sol-gel method. The gel was dried at 80 degrees C for 96 h. The dried gels were individually heated at a rate of 5 degrees C/min up to 600 degrees C, 800 degrees C, and 1000 degrees C. X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were used for to characterize the composition, morphology and particle size of samples. At 800 degrees C a small amount of CaO (about 0.3 wt\%) was detected in which increased after annealing at 1000 degrees C (about 1.1 wt\%). The crystallites are elongated along the c crystallographic axis, but the size anisotropy decreases with increasing temperature above 800 degrees C. The size along the elongation axis increased from 43 nm at 80 degrees C to about 143 nm at 1000 degrees C, as determined by XRD, and from 120 to 280 nm, as measured by TEM. The functional groups were analyzed using Fourier transform infrared (FTIR) and Raman spectroscopies confirming the presence of various and PO(4)(3) and OH(-) bands in the samples. After calcination at 1000 degrees C the bands are more intense which indicates an increase in the cristallynity. The photoluminescence (PL) of HAp treated at various temperatures (80, 600, 800, 1000 degrees C) was also studied. hFOB 1.19 osteoblats cells were used to determine cell proliferation, viability and citotoxicity after interaction with the prepared bioceramics. To evaluate cell proliferation rate quantitative by the hFOB 1.19 cells on HAp samples were cultured to 4 days. Cellular morphology was investigated using FESEM to obtain qualitative information of osteoblast cells on HAp samples. The number of hFOB 1.19 cells on control HAp\_80, HAp\_600, HAp\_800 and HAp\_1000 was 400 +/- 30, 360 +/- 25, 350 +/- 21, 320 +/- 16 and 300 +/- 10 after 4 days. Our results proved that the HAp sintered at 1000 degrees C promoted osteoblast cell attachment and adhesion.
Added by: Laurent Cournède  
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