Méthode de caractérisation physico-chimique pour la sécurisation des procédés de fabrication des particules ultrafines et des nanoparticules

Abstract : Since a few years ago, the nanotechnology industry has extended and the nanoparticles production has become very important. Thus the European research program Nanosafe2 has been initialised in order to assess the risk related to this production. Accidental and toxicological risks have been the main topics of interest. Indeed, the small size of these particles generates some confinement and protection issues. Moreover their health impact is poorly characterised. Our aim is to develop a method that is able to characterise the physical and chemical properties of nanoparticles in air matrix. In order to measure these particles characteristics, we have coupled both methods: the LIBS techniques (Laser Induced Breakdown Spectroscopy) based on a plasma spectroscopy method, and an electrical mobility analysis that implies the use of a DMA (Differential Mobility Analyser). The use of both of these techniques allows us to know direct information about the size, the concentration and the chemical composition of particles in air matrix. Some preliminary studies have been carried out on polydisperse salt aerosols, then monodisperse aerosols have been analysed, down to sizes around 40 nm. These first results show the ability of this kind of tool for on line nanoparticles measurement with a limit concentration of a few micrograms per cubic meter.
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Tanguy Amodeo, Christophe Dutouquet, Michel Attoui, Emeric Frejafon, Olivier Le Bihan. Méthode de caractérisation physico-chimique pour la sécurisation des procédés de fabrication des particules ultrafines et des nanoparticules. 22. Congrès Français sur les Aérosols (CFA 2006), Nov 2006, Paris, France. pp.193-197. ⟨ineris-00976176⟩

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