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Kinetically controlled formation of supported nanoparticles in low temperature supercritical media for the development of advanced nanostructured materials

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMARRE, Samuel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorERRIGUIBLE, Arnaud
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorPERDOMO, Arturo
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCANSELL, François
hal.structure.identifierLaboratoire de Génie Thermique Énergétique et Procédés (EA1932) [LATEP]
dc.contributor.authorMARIAS, Frederic
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorAYMONIER, Cyril
dc.date.issued2009-03-09
dc.identifier.issn1932-7447
dc.description.abstractEnThe formation of surface nanostructures allows assemblies of materials at different scales, opening new routes toward the design of advanced nanostructured materials. The decoration of surfaces with shape- and size-controlled metal nanoparticles can be achieved through the reduction of hexafluoroacetylacetonate complexes [M(hfac)<sub>x</sub>] with H<sub>2</sub> in supercritical CO<sub>2</sub>/alcohol at low temperature with neither catalyst nor surface prefunctionalization. This paper investigates the influence of different alcohols, methanol, ethanol, and isopropanol, used as cosolvent on the reduction kinetics of Cu(hfac)<sub>2</sub>·H<sub>2</sub>0 in the supercritical CO<sub>2</sub>/alcohol/H<sub>2</sub> mixtures. The results are applied to the modeling of the decoration process of silica spheres, used as a model substrate, with copper nanoparticles (5−17 nm). The model, using the decomposition kinetics of the precursor, is based on a bimodal process: (i) an initial homogeneous nucleation in the supercritical media and (ii) a fast heterogeneous growth by coalescence on the surface of the silica particles. We demonstrate good agreements between the simulated results and the experimental data showing an advanced kinetically controlled size of the supported nanoparticles in the range of temperature 100−125 °C and residence time 0−120 min.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enKinetically controlled formation of supported nanoparticles in low temperature supercritical media for the development of advanced nanostructured materials
dc.typeArticle de revue
dc.identifier.doi10.1021/jp809533n
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Physical Chemistry C
bordeaux.page5096-5104
bordeaux.volume113
bordeaux.issue13
bordeaux.peerReviewedoui
hal.identifierhal-00371427
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00371427v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Journal%20of%20Physical%20Chemistry%20C&amp;rft.date=2009-03-09&amp;rft.volume=113&amp;rft.issue=13&amp;rft.spage=5096-5104&amp;rft.epage=5096-5104&amp;rft.eissn=1932-7447&amp;rft.issn=1932-7447&amp;rft.au=MARRE,%20Samuel&amp;ERRIGUIBLE,%20Arnaud&amp;PERDOMO,%20Arturo&amp;CANSELL,%20Fran%C3%A7ois&amp;MARIAS,%20Frederic&amp;rft.genre=article


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