International Journal of Nano Dimension (Int. J. Nano Dimens.) First principles studies on band structures and density of states of graphite surface oxides Volume 4 (2013) Issue 1, August 2013 2024 02 29 First principles studies on band structures and density of states of graphite surface oxides 10.7508/ijnd.2013.01.007 EN N. Syarif Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Indonesia, INDONESIA. Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University, INDONESIA. Journal Article 2024 02 29 Graphite oxide constitutes carbon network with oxygen atoms both on hexagonal arrangement and the edge sites. Structural and electronic properties for graphite-oxygen complexes have been explored using first-principles total-energy calculations within the local density approximation (LDA). Band structures and density of states for the propose carbon 3D models are reported. A finite energy gap and planarity of graphene layer emerges for the oxygen-functionalized graphite, therefore its value varies with the ratio of carbon to oxygen and sites on carbon network.