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X-ray diffraction and solid state NMR studies of the growth of hydroxyapatite on bioactive calcia : silica sol-gel glasses
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UNSPECIFIED (2005) X-ray diffraction and solid state NMR studies of the growth of hydroxyapatite on bioactive calcia : silica sol-gel glasses. In: 9th International Conference on the Structure of Non-Crystalline Materials (NCM9), JUL 11-15, 2004, Alfred Univ, Corning, NY.
Full text not available from this repository.Abstract
An advanced materials characterisation methodology has been used to examine systematically a range of sol-gel glass materials of contemporary biomedical interest. High energy x-ray total diffraction, x-ray fluorescence and Raman spectroscopy, and isotope-enriched O-17 and P-31 MAS NMR have been used to study the local calcium environment in four sol-gel derived bioactive calcium silicate glasses of the general formula (CaO)(x)(SiO2)(1-x), and to gain an atomic scale insight into the nature of the processes initiated when this bioactive glass is immersed in vitro in simulated body fluid (SBF). The results reveal a rapid dissolution of the labile surface calcium ions from the glass within 30 min of immersion in SBF and the later formation of a hydroxyapatite like layer, which MAS NMR suggests is partially ordered locally, but which x-ray diffraction confirms as amorphous overall Annealing the samples at 650 degrees C allows this layer to crystallise, revealing the anticipated hydroxyapatite layer more clearly. The results presented here are consistent with, but greatly extend our previous XRD, Ca-43 and Si-29 MAS-NMR, XANES and EXAFS studies of these materials.
| Item Type: | Conference Item (UNSPECIFIED) |
|---|---|
| Subjects: | Q Science > QD Chemistry T Technology > TP Chemical technology |
| Journal or Publication Title: | PHYSICS AND CHEMISTRY OF GLASSES |
| Publisher: | SOC GLASS TECHNOLOGY |
| ISSN: | 0031-9090 |
| Date: | August 2005 |
| Volume: | 46 |
| Number: | 4 |
| Number of Pages: | 5 |
| Page Range: | pp. 372-376 |
| Publication Status: | Published |
| Title of Event: | 9th International Conference on the Structure of Non-Crystalline Materials (NCM9) |
| Location of Event: | Alfred Univ, Corning, NY |
| Date(s) of Event: | JUL 11-15, 2004 |
| URI: | http://wrap.warwick.ac.uk/id/eprint/34014 |
Data sourced from Thomson Reuters' Web of Knowledge
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