| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Martin, Richard A.
Aston University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (40/40 displayed)
- 2024Multifunctional gallium doped bioactive glasses: a targeted delivery for antineoplastic agents and tissue repair against osteosarcomacitations
- 2020Evaluation of effectiveness of 45S5 bioglass doped with niobium for repairing critical-sized bone defect in in vitro and in vivo models
- 2020Evaluation of effectiveness of 45S5 bioglass doped with niobium for repairing critical-sized bone defect in in vitro and in vivo modelscitations
- 2020Photo-polymerisation variables influence the structure and subsequent thermal response of dental resin matricescitations
- 2019The antimicrobial efficacy of hypoxia mimicking cobalt oxide doped phosphate-based glasses against clinically relevant Gram positive, Gram negative bacteria and a fungal straincitations
- 2019The antimicrobial efficacy of hypoxia mimicking cobalt oxide doped phosphate-based glasses against clinically relevant Gram positive, Gram negative bacteria and a fungal strain
- 2019The Antimicrobial Efficacy of Hypoxia Mimicking Cobalt Oxide Doped Phosphate-Based Glasses against Clinically Relevant Gram Positive, Gram Negative Bacteria and a Fungal Straincitations
- 2018Comprehensive in vitro and in vivo studies of novel melt-derived Nb-substituted 45S5 bioglass reveal its enhanced bioactive properties for bone healingcitations
- 2017Atomic structure of chlorine containing calcium silicate glasses by neutron diffraction and 29Si solid-state NMR
- 2017Atomic structure of chlorine containing calcium silicate glasses by neutron diffraction and 29Si solid-state NMRcitations
- 2017Atomic structure of chlorine containing calcium silicate glasses by neutron diffraction and 29 Si solid-state NMRcitations
- 2017Atomic structure of Mg-based metallic glasses from molecular dynamics and neutron diffraction
- 2017Atomic structure of Mg-based metallic glasses from molecular dynamics and neutron diffractioncitations
- 2016Controlling particle size in the Stöber process and incorporation of calciumcitations
- 2016Bioactive sol-gel glasses at the atomic scale:the complementary use of advanced probe and computer modeling methods
- 2016Bioactive sol-gel glasses at the atomic scale : the complementary use of advanced probe and computer modeling methods
- 2016Probing crystallisation of a fluoro-apatite - mullite system using neutron diffractioncitations
- 2016Bioactive sol-gel glasses at the atomic scalecitations
- 2015Novel sol–gel preparation of (P2O5)0.4–(CaO)0.25–(Na2O)X–(TiO2)(0.35−X) bioresorbable glasses (X = 0.05, 0.1, and 0.15)citations
- 2014The effect of bioglass addition on mechanical and physical properties of photoactive UDMA-TEGDMA resin compositescitations
- 2013Effects of rare-earth co-doping on the local structure of rare-earth phosphate glasses using high and low energy X-ray diffractioncitations
- 2012Characterizing the hierarchical structures of bioactive sol-gel silicate glass and hybrid scaffolds for bone regenerationcitations
- 2012Effect of calcium source on structure and properties of sol-gel derived bioactive glassescitations
- 2012Structural characterization of titanium-doped Bioglass using isotopic substitution neutron diffractioncitations
- 2012Titanium phosphate glass microspheres for bone tissue engineering.citations
- 2011An X-ray micro-fluorescence study to investigate the distribution of Al, Si, P and Ca ions in the surrounding soft tissue after implantation of a calcium phosphate-mullite ceramic composite in a rabbit animal modelcitations
- 2010Structure of liquid and glassy ZnCl2citations
- 2009A study of the formation of amorphous calcium phosphate and hydroxyapatite on melt quenched Bioglass(A (R)) using surface sensitive shallow angle X-ray diffractioncitations
- 2009A molecular dynamics model of the atomic structure of dysprosium alumino-phosphate glasscitations
- 2009Bioactive glass sol-gel foam scaffoldscitations
- 2008Structure and thermal properties of yttrium alumino-phosphate glassescitations
- 2007The structure of the rare-earth phosphate glass (Sm2O3)0.205(P2O5)0.795 studied by anomalous dispersion neutron diffractioncitations
- 2006Direct observation of R...R distances in rare-earth (R) phosphate glasses by magnetic difference neutron diffractioncitations
- 2006Silica-clad neodymium-doped lanthanum phosphate fibers and fiber laserscitations
- 2006Direct observation of R.R distances in rare-earth (R) phosphate glasses by magnetic difference neutron diffractioncitations
- 2004Structure of rare-earth phosphate glasses by neutron diffractioncitations
- 2004Magnetic Differences on GEM - direct observation of closest R.R approach in rare-earth phosphate glasses
- 2003Identification of the relative distribution of rare-earth ions in phosphate glassescitations
- 2003Structure of lanthanum and cerium phosphate glasses by the method of isomorphic substitution in neutron diffractioncitations
- 2003Structure of dysprosium and holmium phosphate glasses by the method of isomorphic substitution in neutron diffractioncitations
Places of action
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article
Structure of dysprosium and holmium phosphate glasses by the method of isomorphic substitution in neutron diffraction
Abstract
The relative distribution of rare-earth ions R<sup>3+</sup> (Dy<sup>3+</sup> or Ho<sup>3+</sup>) in the phosphate glass RAl<sub>0.30</sub>P<sub>3.05</sub>O<sub>9.62</sub> was measured by employing the method of isomorphic substitution in neutron diffraction and, by taking the role of Al into explicit account, a self-consistent model of the glass structure was developed. The glass network is found to be made from corner sharing PO<sub>4</sub> tetrahedra in which there are, on average, 2.32(9) terminal oxygen atoms, O<sub>T</sub>, at 1.50(1) Å and 1.68(9) bridging oxygen atoms, O<sub>B</sub>, at 1.60(1) Å. The network modifying R<sup>3+</sup> ions bind to an average of 6.7(1) O<sub>T</sub> and are distributed such that 7.9(7) R–R nearest neighbours reside at 5.62(6) Å. The Al3+ ion also has a network modifying role in which it helps to strengthen the glass through the formation of O<sub>T</sub>–Al–O<sub>T</sub> linkages. The connectivity of the R-centred coordination polyhedra in (M<sub>2</sub>O<sub>3</sub>)x(P<sub>2</sub>O<sub>5</sub>)<sub>1−x</sub> glasses, where M<sup>3+</sup> denotes a network modifying cation (R<sup>3+</sup> or Al<sup>3+</sup>), is quantified in terms of a parameter f<sub>s</sub>. Methods for reducing the clustering of rare-earth ions in these materials are then discussed, based on a reduction of f<sub>s </sub>via the replacement of R<sup>3+</sup> by Al<sup>3+</sup> at fixed total modifier content or via a change of x to increase the number of O<sub>T</sub> available per network modifying M<sup>3+</sup> cation.