Figure 4
From: Fine tuning of graphene-metal adhesion by surface alloying
Microscopic and spectroscopic characterization of Graphene grown on different PtRu surface alloys.
(a) LEEM images of GR growth on the PtRu surface alloy (Pt coverage = 0.5 ± 0.1 ML) by C2H4 CVD at T = 1020 K. The brighter areas correspond to GR-covered regions of the substrate, while the darker ones indicate clean areas of the sample. (b–d) C1s spectra at ~2 ML C coverage (after subtraction of the Ru3d3/2 signal) and their deconvolution into S, W and second-layer (CS) GR components; intensity evolution of the C1s photoemission intensities of the various C species during C2H4 exposure. The reported S:W intensity ratios were calculated at 2 ML C coverage.
