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The development of functional composite nanomaterials based on graphene andmetal nanoparticles (NPs) is currently the subject of intense researchinterest. In this study we report the preparation of novel type of graphene/Snand graphene/SnOx (1 < x < 2) hybrid nanostructures and their investigation byscanning probe methods. First, we prepare Sn NPs by evaporating 7 - 8 nm tin onhighly oriented pyrolytic graphite substrates. Graphene/Sn nanostructures areobtained by transferring graphene on top of the tin NPs immediately afterevaporation. We show by scanning tunnelling microscopy (STM) and spectroscopy(STS) that tin NPs reduce significantly the environmental p-type doping ofgraphene. Furthermore, we demonstrate by low-temperature STM and STSmeasurements that superconductivity is induced in graphene, either directlysupported by Sn NPs or suspended between them. Additionally, we prepare SnOxNPs by annealing the evaporated tin at 500 ${^o}$C. STS measurements performedon hybrid graphene/SnOx nanostructures reveal the electronic band gap of SnOxNPs. The results can open new avenues for the fabrication of novel hybridsuperconducting nanomaterials with designed structures and morphologies.

Novel graphene/Sn and graphene/SnOx hybrid nanostructures: Induced superconductivity and band gaps revealed by scanning probe measurements