| 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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Stamboulis, Artemis
Imperial College London
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (27/27 displayed)
- 2023A Novel Approach for Powder Bed Fusion of Ceramics Using Two Laser Systemscitations
- 2022Processing and interpretation of core‐electron XPS spectra of complex plasma‐treated polyethylene‐based surfaces using a theoretical peak model
- 2021Antimicrobial bioceramics for biomedical applicationscitations
- 2021An Overview of Sputtering Hydroxyapatite for BiomedicalApplicationcitations
- 2019Mechanical testing of antimicrobial biocomposite coating on metallic medical implants as drug delivery systemcitations
- 2017Types of ceramics: Material classcitations
- 2017Types of ceramics : material class
- 2015Nano-hydroxyapatite deposition on titanium using peptide aptamers
- 2015Functionalization of biomedical surfaces by peptide aptamers
- 2014Electrospun Fibres of Polyhydroxybutyrate Synthesized by Ralstonia eutropha from Different Carbon Sourcescitations
- 2014Electrospun Fibres of Polyhydroxybutyrate Synthesized by Ralstonia eutropha from Different Carbon Sourcescitations
- 2014Use of inter-fibril spaces among electrospun fibrils as ion-fixation and nano-crystallization
- 2014Nanoclay addition to a conventional glass ionomer cementscitations
- 2014Electrospun fibres of polyhydroxybutyrate synthesized by ralstonia eutropha from different carbon sourcescitations
- 2014Effect of nanoclay dispersion on the properties of a commercial glass ionomer cementcitations
- 2013Sol-Gel Preparation of Silica-Based Nano-Fibers for Biomédical Applications
- 2013Active screen plasma nitriding enhances cell attachment to polymer surfacescitations
- 2013Nitrogen plasma surface modification enhances cellular compatibility of aluminosilicate glasscitations
- 2012Durability and reliability of medical polymerscitations
- 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
- 2010Effect of active screen plasma nitriding on the biocompatibility of UHMWPE surfaces
- 2008Solid state MAS-NMR and FTIR study of barium containing alumino-silicate glasses
- 2007Real-time nucleation and crystallisation studies of a fluorapatite glass-ceramics using small-angle neutron scattering and neutron diffractioncitations
- 2007Structural characterization of ionomer glasses by multinuclear solid state MAS-NMR spectroscopycitations
- 2006The influence of montmorillonite clay reinforcement on the performance of a glass ionomer restorativecitations
- 2006Real Time Neutron Diffraction Studies of apatite glass ceramicscitations
- 2002Mechanical properties of biodegradable polymer sutures coated with bioactive glasscitations
Places of action
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article
Structural characterization of ionomer glasses by multinuclear solid state MAS-NMR spectroscopy
Abstract
In the present study we report the results of Si-29, Al-27, P-31 and F-19 magic angle spinning nuclear magnetic resonance spectroscopy (MAS-NMR) of 4.5SiO(2)-(Al2O3)-Al-3-1.5P(2)O(5)-(5-z)CaO-zCaF(2) glasses with z = 0-3 to elucidate the effect of fluoride content on the glass structure. The 29Si MAS-NMR spectra gave a chemical shift of about -90 ppm corresponding to Q(3)(3Al) and Q(4)(3Al). The Al-27 MAS-NMR showed a large broad central peak around 50 ppm, which is assigned to four-coordinated Al linked via oxygen to P. A shoulder around 30 ppm and a small peak at about 0 to -10 ppm appeared in the 27 Al MAS-NMR spectra of the glasses on increasing the fluoride content assigned to five-coordinated and six-coordinated Al species, respectively. The P-31 MAS-NMR spectra indicated the presence of Al-O-P bonds. The P-31 chemical shift decreased with increasing fluoride content as a result of calcium being complexed with fluoride. This resulted in a reduction of the number of available cations to charge balance non bridging oxygens in phosphorus and an increase in the number of Al-O-P bonds being formed, instead. The F-19 spectra indicated the presence of Al-F-Ca(n) and F-Ca(n) species in all the glasses containing fluoride as well as an additional Si-F-Ca(n) species in the glasses with higher fluoride content. Published by Elsevier B.V.