A5068621751- Diatoms and Algae Research
- Concrete and Cement Materials Research
- Radioactive element chemistry and processing
- Mesoporous Materials and Catalysis
- Chemical Synthesis and Characterization
- Bone Tissue Engineering Materials
- Advanced ceramic materials synthesis
- Concrete Properties and Behavior
- Clay minerals and soil interactions
- Adsorption and biosorption for pollutant removal
- Building materials and conservation
- NMR spectroscopy and applications
- Advanced NMR Techniques and Applications
- Zeolite Catalysis and Synthesis
- Iron oxide chemistry and applications
- Diamond and Carbon-based Materials Research
- Calcium Carbonate Crystallization and Inhibition
- Polymer Surface Interaction Studies
- Dental Implant Techniques and Outcomes
- Geochemistry and Elemental Analysis
- Marine Sponges and Natural Products
- Pickering emulsions and particle stabilization
- Nuclear materials and radiation effects
- Fire effects on concrete materials
- Geophysical Methods and Applications
Centre des Matériaux
2011-2022
Sorbonne University Abu Dhabi
2021
Sorbonne Université
2009-2021
Hasanuddin University
2018
Collège de France
2009-2017
Centre National de la Recherche Scientifique
2008-2017
Chimie de la Matière Condensée de Paris
2006-2017
Délégation Paris 6
2014
UPMC Health System
2010
Laboratoire de Chimie
2009
Three silicon oxycarbide glasses (SiCO) with increasing C content were obtained through pyrolysis in inert atmosphere at 1000 °C of sol−gel derived siloxane networks containing Si−CH3 and Si−H bonds. The further annealed 1200, 1400, 1500 to follow their evolution high temperature. Quantitative information concerning the structure before after annealing temperature was collected a wide range techniques (some them used for first time this field) aim probing following: (i) short-range order...
Organically-modified hydroxyapatite materials were synthesized through the addition of oxalic, succinic, adipic and citric acids to a calcium hydroxide solution before neutralization by ammonium dihydrogenphosphate. All carboxylic have significant influence on apatite crystallinity nanoparticle size, as indicated XRD TEM. Chemical thermogravimetric analyses well FTIR {1H}-13C CP MAS NMR spectroscopies indicate that additives are present in final material. 1H, {1H}-31P HPDec MAS, 2D CP-HETCOR...
Incorporation of disulfide bridges in the core structure silica nanoparticles modifies their intracellular fate within dermal fibroblasts, especially influencing degradation pathway.
Abstract Carbon-rich Si–O–C polymer-derived ceramics (PDCs) were investigated by various spectroscopic techniques, in order to characterize the evolution of their predominantly amorphous microstructure upon thermal treatment up 1450°C. Particular attention was addressed modifications excess free carbon phase present these materials. Surprisingly, clusters exhibited high stability above pyrolysis temperature. Despite volume fraction carbon, only a very limited carbothermal reduction process...
Three categories of cementitious materials (Portland cement pastes, siliceous and calcareous sand mortars, microconcretes with silica fume) were subjected to cumulative thermal treatments at temperatures (T) up 1000°C. Changes in room-temperature elastic modulus E*(T) heat treated followed by a non-destructive ultrasonic technique 10 MHz. Each category exhibits specific changes E*(T)/E* 0 plotted against T, where E* was the value before treatment, irrespective water:binder ratio.
In the view of designing functional nanoparticles, encapsulation 1,4,7,10-tetraazacyclododecane (cyclen) within silica nanoparticles using Stöber process was studied. presence cyclen and tetraethoxysilane (TEOS), particles exhibiting an unusual core−shell structure were obtained. On then basis TEM, DLS, NMR data, we suggest that particle core is constituted hybrid primary resulting from cyclen−silica interactions, whereas shell formation results further condensation unreacted precursors....
Zirconia-hydroxyapatite nanocomposites were prepared by sol-gel deposition of zirconium oxide from a alkoxide in the presence apatite colloidal suspension under ultrasonication. The material porosity evolves mainly microporous zirconia to mesoporous hydroxyapatite, with decreasing surface area and increasing pore volume. XRD studies indicate that phase is well-preserved within composite materials. homogeneous dispersion colloids network was supported TEM observations nitrogen sorption...
A layer-by-layer approach was used to build up silica thin films (<500 nm) compatible with Escherichia coli bacteria immobilization and spatially confined growth.
Plant-derived natural bioactive molecules are of great therapeutic potential but, so far, their application in nanomedicine has scarcely been studied. This work aimed at comparing two methodologies, i.e., adsorption and situ incorporation, to prepare hybrid polyphenol/hydroxyapatite nanoparticles. Two flavonoids, baicalin its aglycone derivative baicalein, phenolic acids derived from caffeic acid, rosmarinic chlorogenic acids, were Adsorption these polyphenols on pre-formed hydroxyapatite...