The anistropy of field effect mobility of CVD graphene grown on copper foil.

Wrinkling is a universal phenomenon in graphene transfer process and significantly degrades the electronic transport properties of graphene. Taking advantage of the special surface morphology of the growth substrate of copper foil, graphene is prepared with oriented wrinkles. Furthermore, the electronic transport properties are studied parallel and perpendicular to the wrinkles using cross-shaped FET devices and it is found that the carrier mobility of graphene is anisotropic along these two directions. This discovery will help to prepare electronic devices with higher performance.