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H. Y. Jeong, J. H. Lee and K. F. Hayes, “Characterization of Synthetic Nanocrystalline Mackinawite: Crystal Structure, Particle Size, and Specific Surface Area,” Geo- chimica et Cosmochimica Acta, Vol. 72, No. 2, 2008, pp. 493-505. doi:10.1016/j.gca.2007.11.008

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• TITLE: In Situ Hydroxyapatite Synthesis: Influence of Collagen on Its Structural and Morphological Characteristic

  AUTHORS: Luis C. Mendes, Geysy L. Ribeiro, Raphaella C. Marques

  KEYWORDS: Hydroxyapatite; Collagen; In Situ; Precipitation Method; Morphology

  JOURNAL NAME: Materials Sciences and Applications, Vol.3 No.8, August 22, 2012

  ABSTRACT: Hydroxyapatite (HA) was synthesized in situ by the precipitation method, with and without the presence of collagen (COLL), to study its influence on HA’s structural and morphological characteristics. The material was characterized by energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FT-IR), wide-angle X-ray diffraction (WAXD), thermogravimetric analysis (TG) and scanning electron microscopy (SEM). The Ca/P molar ratio was influenced by collagen addition—1.89 and 2.38 for samples without and with collagen, respectively. The WAXD pattern revealed better resolution and intensity besides higher crystallinity degree of the HA in the presence of collagen. The photomicrographs showed a strong influence of collagen on the HA morphology.