publication . Article . 2006

X-ray absorption spectroscopy and high-energy XRD study of the local environment of copper in antibacterial copper-releasing degradable phosphate glasses

Karen Wetherall; Jonathan C. Knowles; Ifty Ahmed; Mark E. Smith; Victoria Fitzgerald; David M. Pickup; Robert J. Newport; Robert M. Moss;
  • Published: 12 Jun 2006 Journal: Journal of Non-Crystalline Solids, volume 352, pages 3,080-3,087 (issn: 0022-3093, Copyright policy)
  • Publisher: Elsevier BV
  • Country: United Kingdom
Phosphate-based glasses of the general formula Na2O-CaO-P2O5 are degradable in an aqueous environment, and therefore can act as antibacterial materials through the inclusion of ions such as copper. In this study, CuO and Cu2O were added to Na2O-CaO-P2O5 glasses (1-20 mol% Cu) and X-ray absorption spectroscopy (XAS) and high-energy X-ray diffraction (HEXRD) used to probe the local environment of the copper ions. Copper K-edge X-ray absorption near-edge structure (XANES) spectra confirm the oxidation state of copper to be predominantly 2+ in all samples regardless of which copper oxide was used in the preparation. The XANES results suggest the structural environme...
free text keywords: Materials Chemistry, Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Ceramics and Composites, Q, Chemistry, Inorganic chemistry, Extended X-ray absorption fine structure, Crystallography, Absorption spectroscopy, Copper, chemistry.chemical_element, XANES, X-ray absorption spectroscopy, Phosphate glass, X-ray crystallography, Copper oxide, chemistry.chemical_compound
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