Figure 2
From: Fine tuning of graphene-metal adhesion by surface alloying
Microscopic, spectroscopic and theoretical characterisation of Graphene on Ru(0001).
(a) LEEM images of graphene growth on clean Ru(0001) by C2H4 exposure at T = 1020 K (p(C2H4) = 2 ÷ 5 × 10−8 mbar). In the inset is shown (in grey) the sample area already covered by graphene. (b) C 1s spectra during C2H4 exposure at T = 1020 K. (c) Partial coverage of strongly (S) and weakly (W) interacting GR and C monomers (CA) as a function of the total C coverage. (d) Side and top view of the DFT-simulated moiré cell of GR/Ru(0001); the colour scale reflects the C-substrate distance. (e) Comparison between the experimental C 1s spectrum of GR and the calculated spectral distribution. The decomposition of the theoretical spectrum into strongly (S-theo) and weakly (W-theo) interacting components is also shown superimposed, along with the histogram of the calculated BE distribution.
