Nanometer Coatings of Hydroxyapatite Characterized by Glancing-Incidence X- Ray Diffraction

Abstract:

Hydroxyapatite (HAP) crystalline thin-coatings have been grown using a right angle RF magnetron sputtering approach at room temperature. The surface structural information of these biocompatible coatings at nanometer scales was obtained by glancing-incidence X-ray diffraction (GIXRD) with synchrotron radiation. The GIXRD spectra were obtained by fixed incidence theta angles at 0.5 and 1 degree. Structural profile analyses were performed over these nano-coating layers with reduced substrate interference. The coating thickness was calibrated by specular X-ray reflectivity (XRR) curves. Experiments have been performed on thin-coatings of HAP sputtered on silicon wafers and acid etched titanium discs at room temperature. GIXRD analysis has shown that all the principal peaks are attributed to a crystalline HAP. Previous tests of biocompatibility with osteoblasts cells have been encouraging studies on the surface of hydroxyapatite thin coatings prepared by opposing RF magnetron sputtering approach, as a promising candidate for bioimplant materials.

• Periodical: Key Engineering Materials (Volumes 396-398)
• Pages: 369-372
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.396-398.369
• Online since: October 2008
• Authors: Alexandre Mello, Elena Mavropoulos, Zhen Hong, J.B. Ketterson, Antonella M. Rossi
• Keywords: Glancing-Incidence X-Ray Diffraction, Hydroxyapatite (HAP), Magnetron Sputtering, Synchrotron Radiation (XRD), Thin Coating

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DOI: 10.1016/j.dental.2006.06.025