Is silicene stable in O2? —First-principles study of O2 dissociation and O2-dissociation–induced oxygen atoms adsorption on free-standing siliceneG. Liu, X. L. Lei, M. S. Wu, B. Xu and C. Y. OuyangEPL, 106 4 (2014) 47001DOI: https://doi.org/10.1209/0295-5075/106/47001