| Title | The uptake of titanium ions by hydroxyapatite particles - Structural changes and possible mechanisms |
| Publication Type | Journal Article |
| 2006 |
| Authors | Ribeiro, CC, Gibson, I, Barbosa, MA |
| Journal | BiomaterialsBiomaterials |
| Volume | 27 |
| Issue | 9 |
| Pagination | 1749 - 1761 |
| Date Published | 2006/// |
| 01429612 (ISSN) |
| article, Biocompatible Materials, concentration response, differential scanning calorimetry, drug mechanism, drug structure, Durapatite, Energy dispersive spectroscopy, Fourier transform infrared spectroscopy, hydroxyapatite, Incubation, infrared spectroscopy, Ions, Lattice constants, particulate matter, powder, Precipitation (chemical), priority journal, Solutions, Spectroscopy, Spectroscopy, Fourier Transform Infrared, temperature, Titanium, Titanium ions, Titanium phosphate, X ray diffraction, X ray diffraction analysis, X ray photoelectron spectroscopy, X-Ray Diffraction |
| In order to understand the effect of titanium ions on the molecular structure of hydroxyapatite (HAp), HAp powders were incubated in solutions with different titanium concentrations. After incubation, the powders obtained were analysed using different techniques, namely X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), differential thermal analysis (DTA), X-ray photoelectron spectroscopy (XPS), and energy dispersive spectroscopy (EDS). The results suggest that, depending on the concentration of titanium in solution, two different mechanisms of interaction with HAp occur. For concentrations equal to or smaller than 200 ppm, the titanium uptake by the solid seems to be primarily due to incorporation in the lattice. For higher concentrations, a dissolution-precipitation process seems to occur, leading to formation of a titanium phosphate compound. © 2005 Elsevier Ltd. All rights reserved. |
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