Application of the laser pyrolysis to the synthesis of TiC and ZrC pre-ceramics nanopowders

Nano-SiC/CNT composites sintered by SPS: CNT amount effect on mechanical, thermal and electrical properties

International audience

Propriétés mécaniques, thermiques et électriques de composites à matrice SiC nanostructurée renforcée de nanotubes de carbone

International audience

Impact of Titanium Dioxide Nanoparticle Dispersion State and Dispersion Method on Their Toxicity Towards A549 Lung Cells and Escherichia coli Bacteria

International audience; Titanium-dioxide nanoparticle (TiO2-NPs) dispersion for toxicological studies is classically achieved by high power sonication. The aim of this study was to compare the dispersion state resulting from different dispersion techniques, and to correlate dispersion state and dispersion method to in vitro toxicity in a final view to contribute to the very active field of establishing protocols for reliable NP toxicity testing. To achieve this objective, several dispersion methods were applied to Evonik P25 TiO2-NPs. The dispersion state, as well as the stability of these TiO2-NP suspensions were evaluated by photon correlation spectroscopy (PCS) and turbidimetry. A549 hum…

Laser pyrolysis growth of ZrC, TiC, and SiC nanopowders for nanostructured ceramics elaboration

Propriétés mécaniques, thermiques et électrioques de composites à matrice SiC nanostructurée renforcée par des nanotubes de carbone

International audience

The materials saga: sintering

In ICV no 1010, we inaugurated our materials saga with the classification and shaping of ceramics. This second and short chapter deals with sintering and its different forms: non reactive or reactive sintering, natural or pressure sintering as well as two essential parameters: density and porosity.

Composites nano-SiC/Nanotubes de carbone frittés par SPS: Elaboration et influence de la teneur en NTC sur les propriétés mécaniques

International audience

Influence of Nitrogen Doping on Device Operation for TiO 2 -Based Solid-State Dye-Sensitized Solar Cells: Photo-Physics from Materials to Devices

International audience; Solid-state dye-sensitized solar cells (ssDSSC) constitute a major approach to photovoltaic energy conversion with efficiencies over 8% reported thanks to the rational design of efficient porous metal oxide electrodes, organic chromophores, and hole transporters. Among the various strategies used to push the performance ahead, doping of the nanocrystalline titanium dioxide (TiO 2) electrode is regularly proposed to extend the photo-activity of the materials into the visible range. However, although various beneficial effects for device performance have been observed in the literature, they remain strongly dependent on the method used for the production of the metal o…