Sulfur dioxide adsorbed on graphene and heteroatom-doped graphene: a first-principles study Li Shao, Guangde Chen, Honggang Ye, Yelong Wu, Zhijuan Qiao, Youzhang Zhu and Haibo Niu Eur. Phys. J. B, 86 2 (2013) 54 Published online: 13 February 2013 DOI: 10.1140/epjb/e2012-30853-y