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Author Madito, M. J. ♦ Bello, A. ♦ Dangbegnon, J. K. ♦ Momodu, D. Y. ♦ Masikhwa, T. M. ♦ Barzegar, F. ♦ Manyala, N. ♦ Oliphant, C. J. ♦ Jordaan, W. A. ♦ Fabiane, M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ALLOYS ♦ ANNEALING ♦ ATMOSPHERIC PRESSURE ♦ CHEMICAL VAPOR DEPOSITION ♦ DOPED MATERIALS ♦ ELECTRON DIFFRACTION ♦ EMISSION SPECTROSCOPY ♦ GRAPHENE ♦ LAYERS ♦ MASS SPECTROSCOPY ♦ NICKEL ♦ THIN FILMS
Abstract A bilayer graphene film obtained on copper (Cu) foil is known to have a significant fraction of non-Bernal (AB) stacking and on copper/nickel (Cu/Ni) thin films is known to grow over a large-area with AB stacking. In this study, annealed Cu foils for graphene growth were doped with small concentrations of Ni to obtain dilute Cu(Ni) alloys in which the hydrocarbon decomposition rate of Cu will be enhanced by Ni during synthesis of large-area AB-stacked bilayer graphene using atmospheric pressure chemical vapour deposition. The Ni doped concentration and the Ni homogeneous distribution in Cu foil were confirmed with inductively coupled plasma optical emission spectrometry and proton-induced X-ray emission. An electron backscatter diffraction map showed that Cu foils have a single (001) surface orientation which leads to a uniform growth rate on Cu surface in early stages of graphene growth and also leads to a uniform Ni surface concentration distribution through segregation kinetics. The increase in Ni surface concentration in foils was investigated with time-of-flight secondary ion mass spectrometry. The quality of graphene, the number of graphene layers, and the layers stacking order in synthesized bilayer graphene films were confirmed by Raman and electron diffraction measurements. A four point probe station was used to measure the sheet resistance of graphene films. As compared to Cu foil, the prepared dilute Cu(Ni) alloy demonstrated the good capability of growing large-area AB-stacked bilayer graphene film by increasing Ni content in Cu surface layer.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-01-07
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 119
Issue Number 1


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