Preparation of large grain size graphene by chemical vapor deposition


      Practical application of graphene requires the structure continuity and structure coherence, which in turn requires the production of graphene with large domain size. Aiming to increase the graphene domain size, we have investigated a variety of parameters, which consequently enables us to obtain graphene flakes with centimeter size with unprecedented high growth rate.  Electron diffraction and Raman mapping measurement show that the graphene flakes are single crystal in nature. Electron transport measurement in Hall bar configuration demonstrate that the graphene exhibit high carrier mobility and exceptional electronic properties.  Our method allows the production of high quality graphene film for further applications.