Interaction of Oxygen Adsorbates via Graphene

Understanding the state of the surface of graphene is crucial for applications that rely on charge mobility. A graphene surface can be drastically changed by the presence of adsorbates, altering the transport and chemical properties of the surface. Our investigation focuses on one of the most prevalent adsorbates found on graphene, oxygen. Through the use of first principle density functional calculations and analytical Green's functions, we show that the interaction of the bivalent oxygen adsorbates differs significantly from monovalent adsorbates, such as fluorine.