Authors: M MartinGallego M A LopezManchado P Calza I Roppolo M Sangermano
Publish Date: 2014/09/27
Volume: 50, Issue: 2, Pages: 605-610
Abstract
Graphene 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 UVcurable 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
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