摘要:Scientific Reports 3 , Article number: 3482 10.1038/srep03482 ( 2013 ); Published: 16 December 2013 ; Updated: 8 July 2014 There are typographical errors in the section entitled “Grain boundaries” in the PDF version of this Article, where “γ” was omitted. The sentence “The formation energy of grain boundaries, , as function of the angle θ is shown in Fig. 6c, as calculated by the CFF and DFT methods.