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Graphene on noble-metal nanostructures constitutes an attractivenanocomposite with possible applications in sensors or energy conversion. Inthis work we study the properties of hybrid graphene/gold nanoparticlestructures by Raman spectroscopy and Scanning Probe Methods. The nanoparticles(NPs) were prepared by local annealing of gold thin films using focused laserbeam. The method resulted in a patterned surface, with NPs formed atarbitrarily chosen microscale areas. Graphene grown by chemical vapourdeposition was transferred onto the prepared, closely spaced gold NPs. While wefound that successive higher intensity (6 mW) laser irradiation increasedgradually the doping and the defect concentration in SiO2 supported graphene,the same irradiation procedure did not induce such irreversible effects in thegraphene supported by gold NPs. Moreover, the laser irradiation induced dynamichydrostatic strain in the graphene on Au NPs, which turned out to be completelyreversible. These results can have implications in the development ofgraphene/plasmonic nanoparticle based high temperature sensors operating indynamic regimes.

Dynamic strain in gold nanoparticle supported graphene induced by focused laser irradiation