Table 1
Absolute surface energiesEsurfn×mandγn×mfor various orientations and reconstructions
Orientation	Reconstruction	Esurf (eV/1 × 1 cell)	γ (J/m2)
(111)	2 × 1	0.993	2.91
		(1.369)	(4.06)
	H-covered	−1.903	−5.57
		(−2.760)	(−8.19)
(110)	1 × 1 relaxed	1.824	3.27
		(3.264)	(5.93)
	H-covered	−4.971	−8.91
		(−5.496)	(−9.99)
(331)	1 × 1 graphitic	2.040	2.31
	H-covered	−5.808	−6.58

The values in parentheses from [21] are listed for comparison.

Xu et al. Nanoscale Research Letters 2012 7:460   doi:10.1186/1556-276X-7-460