MARRE, Samuel; CANSELL, François; AYMONIER, Cyril

doi:10.1088/0957-4484/17/18/011

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MARRE, Samuel
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

CANSELL, François
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

AYMONIER, Cyril
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Nanotechnology. 2006, vol. 17, n° 18, p. 4594-4599

Institute of Physics

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Recent developments in multifunctional devices show the interest in combining different materials to obtain specific properties. Through supercritical fluid chemical deposition (SFCD), silica spheres, used as a model support, were coated with copper nanoparticles (5-17 nm) with a tuneable amount of coverage (40-80%). The coating process is based on the reduction of metal precursors with hydrogen in a supercritical CO2/isopropanol mixture in a temperature range between 100 and 150 °C at 24 MPa. Several parameters were studied such as temperature, residence time or mass ratio of precursor/silica spheres, allowing control of the size of the copper nanoparticles and of the amount of coverage from metal nanoparticles scattered onto the surface to a metal nanoparticle thin film.< Réduire

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Design at the nanometre scale of multifunctional materials using supercritical fluid chemical deposition

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