Nano hydroxyapatite crystals obtained by colloidal solution
D. Meza, I.A. Figueroa, C. Flores–Morales, and M.C. Piña–Barba
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Ciudad Universitaria, Circuito exterior s/n, Mexico. 04510 D.F. México. E–mail: mcpb@unam.mx
Recibido el 30 de mayo de 2011
Aceptado el 19 de septiembre de 2011
Abstract
A process for synthesising nanocrystalline hydroxyapatite powders using calcium nitrate tetrahydrated [Ca(NO3)2–4H2O] and phosphorous pentoxide [P2O5] by colloidal solution, is presented and discussed. The powders were washed and calcinated at different temperatures and then characterised by X–ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The powder size was compared with the results obtained from TEM and the calculated with the Scherrer's formula.
Keywords: Hydroxyapatite; nanocrystals; X–Ray diffraction; biomaterials; colloidal solution.
Resumen
En este trabajo se presenta un proceso de síntesis por solución coloidal para obtener polvos nanocristalinos de hidroxiapatita usando nitrato de calcio tetrahidratado [Ca(NO3)2–4H2O] y pentoxido de fosforo [P2O5]. Los polvos obtenidos fueron lavados y calcinados a diferentes temperaturas para ser caracterizados empleando difracción de rayos X (DRX), microscopía electrónica de barrido (MEB) y microscopía electrónica de trasmisión (MET). El tamaño de los polvos se obtuvo comparando los resultados obtenidos por MET con los calculados por DRX usando la fórmula de Scherrer.
Descriptores: Hidroxiapatita; nanocristales; difracción de Rayos X; biomateriales; solución coloidal.
PACS: 61.05.C; 81.07.–b; 81.10.Dn
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Acknowledgements
All authors would like to acknowledge DGAPA of the National Autonomous University of Mexico for the financial support trough project No. IT104011. Adriana Tejeda and Omar Novelo are also acknowledged for their technical support.
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