The structure and properties of silver-doped phosphate-based glasses

Ahmed, Ifty and Abou Neel, Ensanya A. and Valappil, Sabeel P. and Nazhat, S.N and Pickup, David M. and Carta, Daniela and Carroll, Donna L. and Newport, Robert J. and Smith, Mark E. and Knowles, Jonathan C. (2007) The structure and properties of silver-doped phosphate-based glasses. Journal of Materials Science, 42 (23). pp. 9827-9835. ISSN 0022-2461. (Access to this publication is restricted)

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http://dx.doi.org/10.1007/s10853-007-2008-9

Abstract

An undoped and two silver-doped (0, 3 and 5 mol% Ag) phosphate glass compositions were investigated for their structure and properties. These compositions had in a previous study been investigated for their antimicrobial properties, and were found to be extremely potent at inhibiting the micro-organisms tested. Thermal, X-ray diffraction (XRD), nuclear magnetic resonance (NMR) and X-ray absorption Near Edge Structure (XANES) studies were used to elucidate the structure of the compositions investigated, whilst degradation and ion release studies were conducted to investigate their properties. No significant differences were found between the T (g) values of the silver containing glasses, while XRD analysis revealed the presence of a NaCa(PO3)(3) phase. NMR showed the dominance of Q(2) species, and XANES studies revealed the oxidation state of silver to be in the +1 form. No correlation was seen between the degradation and cation release profiles observed, and the P3O93 anion was the highest released anionic species, which correlated well with the XRD and NMR studies. Overall, it was ascertained that using Ag2SO4 as a precursor, and producing compositions containing 3 and 5 mol% Ag, the levels of silver ions released were within the acceptable cyto/biocompatible range.

Item Type: Article
Subjects: Q Science > QC Physics
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group
Depositing User: Katie Edwards
Date Deposited: 19 Dec 2007 19:31
Last Modified: 18 Jun 2014 14:29
Resource URI: http://kar.kent.ac.uk/id/eprint/2160 (The current URI for this page, for reference purposes)
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