In order to estimate the resuspension of the particles empirically, it is necessary to carry out a homogeneous distribution of the particles on the tested surfaces. Thus, in many studies, seeding or deposition in experimental chambers is performed to quantify initial concentrations for subsequent resuspension experiments. The current study was carr...
Ce travail s'est intéressé à la remise en suspension de particules métalliques (PM2.5) dans un contexte de milieu urbain. Il s'est agi d'estimer la part de particules ré-entrainées dans l'air sous l'effet de paramètres météorologiques et pour des surfaces représentatives de milieux urbains. Dans ce but, des éprouvettes de surfaces de bâti (ardoise,...
Les procédés métallurgiques à haute température (ou « la mise à haute température de métaux par des procédés ») tels que l'atomisation, la projection thermique ou la fabrication additive, entraînent la production d'effluents métalliques particulaires, composés pour partie de nanoparticules. Il existe un besoin en matière de connaissances, tant au n...
Pt in/on silica nanoparticles were synthesized by flame spray pyrolysis (FSP) followed by H-2 reduction at different temperature and tested in benzene complete oxidation reaction. The Pt clusters diffusion from the interior to the exterior of the SiO2 matrix followed by aggregation in/on the SiO2 matrix was observed with elevated temperature (30011...
Nanocomposite thin films of fullerene C(60) containing Ag nanoparticles (NPs) were synthesized by thermal codeposition. The surface plasmon resonance (SPR) band of the nanocomposite film was observed in the region 450-550 nm, showing a large redshift with increasing metal concentration. This is explained by the Maxwell-Garnett effective medium theo...
We report the electronic excitation induced controlled tuning of the surface plasmon resonance (SPR) wavelength of Ag nanoparticles (NPs) in fullerene C(70) matrix. The transformation of fullerene C(70) into amorphous carbon (a:C) under ion irradiation is used to tune the SPR wavelength of C(70)-Ag nanocomposite thin films. A 100 nm blue shift was ...
A modified polyol process for the preparation of nickel powders of rodlike shape Was attempted and reaction parameters such as alkaline amount, temperature, reactant concentration, and reduction time were varied for controlling shape, size and agglomeration of the nickel particles. The rodlike nickel powders with particle size of 1-8 mum long and 0...
Germany
