How ionized radicals bind to Ir(111) supported graphene

Sammanfattning: In this thesis radical adsorption onto Ir(111) supported graphene at room temperature is studied using scanning tunneling microscopy. The radicals were formed in by thermal cleavage of C2H4 molecules. First of all, the analysis of the location of the adsorbed radicals reveals that the radicals prefer to adsorb in so-called HCP/FCC areas of the graphene film where the graphene film is located closer to the Ir(111) substrate. Further, the carbon bond configuration in these areas allows rehybridization from graphite like bonding to diamond like bonding upon radical adsorption. Secondly, the analysis of the relative distance between adsorbed radicals demonstrates that radicals have a tendency to bind in the immediate proximity of other radicals.