Graphene to graphite; a layer by layer experimental measurements and density function theory calculations of electric conductivity

Embargo End Date
2021-05-26

Type
Article

Authors
Amer, Maher S.
Mohammed, Mohammed K.
Al Mafrage, Ali M.

KAUST Department
King Abdullah University of Science and Technology (KAUST), Physical Science and Engineering Division (PSE), Thuwal, Saudi Arabia

Online Publication Date
2020-05-26

Print Publication Date
2020-10-01

Date
2020-05-26

Submitted Date
2019-10-11

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.

Citation
Amer, M. S., Mohammed, M. K., & Al Mafrage, A. M. (2020). Graphene to graphite; a layer by layer experimental measurements and density function theory calculations of electric conductivity. Philosophical Magazine, 1–12. doi:10.1080/14786435.2020.1766710

Acknowledgements
The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). For computer time, this research used the resources of the Supercomputing Laboratory at KAUST.

Publisher
Informa UK Limited

Journal
Philosophical Magazine

DOI
10.1080/14786435.2020.1766710

Additional Links
https://www.tandfonline.com/doi/full/10.1080/14786435.2020.1766710

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