Interactions between oxygen adsorbates on graphene

Control over the state of the surface of graphene and its chemical functionality is crucial in many applications including mobility-reliant electronic applications, as well as chemical sensors. Adsorbates can dramatically change transport and chemical properties of graphene. We present results of analytical and numerical investigation of interactions between some of the most commonly found adsorbates - oxygen atoms. Interactions between these bivalent adsorbates substantially differ from simpler monovalent adsorbates, such as fluorine. Our investigation utilizes a synergistic approach combining analytical green's function analysis and first principle density functional calculations.