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Graphene to graphite; a layer by layer experimental measurements and density function theory calculations of electric conductivity |
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| Authors: | Maher S Amer Mohammed K Mohammed Ali M Al Mafrage |
| Institution: | 1. King Abdullah University of Science and Technology (KAUST), Physical Science and Engineering Division (PSE), Thuwal, Saudi Arabia;2. Department of Mechanical and Materials Engineering, Wright State University, Dayton, OH, USA maher.amer@wright.edu;4. Department of Mechanical and Materials Engineering, Wright State University, Dayton, OH, USA |
| Abstract: | ABSTRACT We measured the electric conductivity of large (25?×?50?mm) graphene films as a function of number of layers in the range of 1–20 layers. We also calculated the energy gap for such samples using density function theory. Our results showed a conductivity slightly above that of ITO for monolayer graphene and an exponential decrease as the number of graphene layers increased. Both experimental and simulation results showed a convergence of graphene into graphite at as little as 18–20 layers. |
| Keywords: | Graphene graphite electrical conductivity density-functional theory |