101765.fig.002a
(a)
101765.fig.002b
(b)
101765.fig.002c
(c)
101765.fig.002d
(d)
Figure 2: AFM topographic images (top) and the corresponding Raman spectra (bottom) of graphene M1. (a) Before annealing; (b) annealing at 300°C in vacuum of 5 mbar; (c) annealing at 400°C in vacuum of 5 mbar; (d) annealing at 400°C in N2/H2 of 50 mbar. Scale bars are 300 nm in length (colors online).