Formation of Pt and Rh Nanoclusters on a Graphene Moiré Pattern on Cu(111)

摘要: The formation of Pt and Rh nanoclusters on a graphene moire pattern Cu(111) was studied with ultrahigh vacuum scanning tunneling microscopy (UHV-STM). Isolated islands different periodicities were successfully grown the Cu surface. As result weak coupling to substrate, rotational domains observed including one periodicity 4 nm that has not been previously reported. Furthermore, our results have shown form dispersed graphene/Cu(111) forming more regular structures trapped mostly at hollow sites. This variation in growth behavior is mainly attributed differences Pt–carbon Rh–carbon interaction energies. Thermal stability experiments also performed, clusters found be structurally stable up 700 K.