Graphene Manipulation on 4H-SiC(0001) Using Scanning Tunneling Microscopy
نویسندگان
چکیده
Atomic-scale topography of epitaxial multilayer graphene grown on 4H-SiC(0001) was investigated using scanning tunneling microscopy (STM). Bunched nano-ridges ten times smaller than previously recorded were observed throughout the surface, the morphology of which was systematically altered using a relatively new technique called electrostatic-manipulation scanning tunneling microscopy. Transformed graphene formations sometimes spontaneously returned to their original morphology, while others permanently changed. Using an electrostatic model, we calculate that a force up to 5 nN was exerted by the STM tip, and an energy of around 10 eV was required to alter the geometry of a 100 200 nm area. # 2013 The Japan Society of Applied Physics
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