Structures and electronic properties of oxidized graphene from first-principles study Yang Zhang, Dang-Qi Fang, Sheng-Li Zhang, Yu-Hua Wen and Zi-Zhong Zhu EPL, 105 3 (2014) 37005 Published online: 20 February 2014 DOI: 10.1209/0295-5075/105/37005