Synthesis of CeO2@SiO2 core-shell nanoparticles by water-in-oil microemulsion. Preparation of functional thin film.
Synthesis of nanoparticles under restricted environment offered by water-in-oil (W/O) microemulsions provides excellent control over particle size and shape, and inter-particle spacing. Such an environment has been involved to synthesize silica nanoparticles with a CeO2 core, so-called CeO2@SiO2. Aqueous fluids made up of ceria nanoparticles with a size close to 5 nm have been used as the water phase component. The starting CeO2 sols and obtained CeO2@SiO2 nanoparticles have been characterized by dynamic light scattering (DLS), X-ray diffraction, scanning and transmission electron microscopy, and specific surface area measurements. The microemulsion process has been characterized by DLS. Preliminary results on CeO2@SiO2 thin films are presented.
UMR Science Chimiques de Rennes UR1-CNRS 6226, Groupe Chimie du Solide et Matériaux, Université de Rennes 1, Campus de Beaulieu, CS74205, F-35042 Rennes cedex, France. grasset@univ-rennes1.fr
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Grasset
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Marchand
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Marie
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Fauchadour
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Fajardie