Figure 4
From: CVD graphene/Ge interface: morphological and electronic characterization of ripples
Honeycomb structure and ripples of graphene on Ge(100) obtained by STM. (a and b) Are images performed on the same area of the film. They clearly show the ripples in single-layer graphene. The image shown in (b) was obtained with +30° tilt in the scan direction with respect to (a) image. The image in (a) is the same shown in Fig. 2(c). The tunneling conditions for (a and b) were the same: V = 25 mV, I = 0.5 nA. The axes inserted in (a and b) are the specified zigzag (blue arrow) and armchair (green arrow) directions, while X- and Y- scan axes are aligned to the cleavage plane of the Ge substrate, and perpendicular to the main axis of the tip.
