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Gold-functionalized graphene as conductive filler in UV-curable epoxy resin

AuthorsMartin-Gallego, M.; López-Manchado, Miguel A. ; Calza, P.; Roppolo, I.; Sangermano, Marco
Issue Date2014
CitationJournal of Materials Science 50: 605-610 (2014)
AbstractGraphene sheets (GNPs) were functionalized with gold nanoparticles via a spontaneous deposition of gold particles on its surface occurred by chemical reduction of (Au3+). Even after only 1 min of reaction, the reduction of Au3+ into metallic Au0, takes place in evidencing the rapid and spontaneous character of the reduction. The particles, after only 3 min of deposition, have very small diameters, with average centred at 17 nm. The Au–GNP nanofillers were dispersed into UV-curable epoxy resin. Conductivity of the epoxy crosslinked samples containing Au–GNP nanofiller were compared to the values obtained for epoxy nanocomposite containing the same amount of bare graphene; the electrical conductivity was significantly increased by the addition of Au–GNP nanofiller, of about four orders of magnitude. This could be attributed to a charge transfer mechanism, which is strongly enhanced by the presence of gold NPs.
Identifiersdoi: 10.1007/s10853-014-8619-z
issn: 0022-2461
e-issn: 1573-4803
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