Figure 2
From: Realization of Large-Area Wrinkle-Free Monolayer Graphene Films Transferred to Functional Substrates
(a), The rms roughness for the graphene films transferred to Ti adhesion layers with various thicknesses. The variations in the rms roughness of the Ti/glass as a function of the Ti thickness are shown in (a). Two-dimensional AFM images (1 × 1 μm2) of the graphene films transferred to (b) 0, (c) 2, (d) 10 and (e) 20 nm-thick Ti adhesion layers. The upper insets in (c), (d) and (e) show the two-dimensional AFM images for Ti adhesion layers grown on the glass substrate. (f and g) Two-dimensional AFM images observed at 1 × 1 and 5 × 5 μm2 areas for the graphene films transferred to the 10 nm-thick Ti layer, respectively. The rms roughness of the (f) and (g) was approximately 0.17 ± 0.02 nm and 0.21 ± 0.03 nm, respectively.
