Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Structural characteristics of antibacterial bioresorbable phosphate glass
AU - Moss, Robert M.
AU - Pickup, David M.
AU - Ahmed, Ifty
AU - Knowles, Jonathan C.
AU - Smith, Mark E.
AU - Newport, Robert J.
PY - 2008/2/1
Y1 - 2008/2/1
N2 - Neutron diffraction with isotopic substitution has been used to probe the local environment of silver in a melt-quench derived bioresorbable phosphate glass. Samples enriched with Ag-107 and Ag-109 were prepared and neutron diffraction data collected. A first-order difference was taken between the data sets to give detailed information about the silver environment in the glass matrix. The measured Ag-O correlation has three components in the first coordination shell at 2.28 angstrom, 2.51 angstrom, and 2.58 angstrom with coordination numbers of 2.1,23, and 1.1, respectively, consistent with silver occupying a distorted octahedral environment. These results have been correlated with those from Ag K-edge X-ray absorption near-edge spectroscopy measurements. The results suggest that the addition of silver to the (CaO)(0.3)(Na2O)(0.2)(P2O5)(0.5) system has a significant effect on the host phosphate network, with shorter and more branched chains replacing the long chains and rings normally associated with the metaphosphate composition.
AB - Neutron diffraction with isotopic substitution has been used to probe the local environment of silver in a melt-quench derived bioresorbable phosphate glass. Samples enriched with Ag-107 and Ag-109 were prepared and neutron diffraction data collected. A first-order difference was taken between the data sets to give detailed information about the silver environment in the glass matrix. The measured Ag-O correlation has three components in the first coordination shell at 2.28 angstrom, 2.51 angstrom, and 2.58 angstrom with coordination numbers of 2.1,23, and 1.1, respectively, consistent with silver occupying a distorted octahedral environment. These results have been correlated with those from Ag K-edge X-ray absorption near-edge spectroscopy measurements. The results suggest that the addition of silver to the (CaO)(0.3)(Na2O)(0.2)(P2O5)(0.5) system has a significant effect on the host phosphate network, with shorter and more branched chains replacing the long chains and rings normally associated with the metaphosphate composition.
KW - SILVER
KW - POLYPHOSPHATES
KW - COMPOSITES
KW - BACTERIA
KW - AG
U2 - 10.1002/adfm.200700721
DO - 10.1002/adfm.200700721
M3 - Journal article
VL - 18
SP - 634
EP - 639
JO - Advanced Functional Materials
JF - Advanced Functional Materials
SN - 1616-3028
IS - 4
ER -