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- Title
Graphene layers fabricated from the Ni/a-SiC bilayer precursor.
- Authors
Nazarov, A. N.; Vasin, A. V.; Gordienko, S. O.; Lytvyn, P. M.; Strelchuk, V. V.; Nikolenko, A. S.; Stubrov, Yu. Yu.; Hirov, A. S.; Rusavsky, A. V.; Popov, V. P.; Lysenko, V. S.
- Abstract
This paper considers a synthesis of graphene flakes on the Ni surface by vacuum long and nitrogen rapid thermal treatment of the "sandwich" amorphous (a) SiC/Ni multilayer deposited on silicon wafer by magnetron sputtering technique. The lateral size of graphene flakes was estimated to be about hundreds of micrometers while the thickness estimated using Raman scattering varied from one to few layers in case of vacuum annealing. Rapid thermal annealing (RTA) in nitrogen ambient results in formation of multilayer graphene with surface covering up to 80%. The graphene layers synthesized on Ni during CVD process was used as reference samples. Atomic force microscopy (AFM) is not able to detect graphene flakes in regime of surface topology examination because of large roughness of Ni surface. Employment of scanning Kelvin probe force microscopy (SKPFM) demonstrates correlation of the surface potential and graphene flakes visible in optical microscopy. Using the KPFM method, potential differences between Ni and graphene were determined.
- Subjects
GRAPHENE synthesis; MICROFABRICATION; NICKEL; SILICON carbide; BILAYERS (Solid state physics); CHEMICAL precursors
- Publication
Semiconductor Physics, Quantum Electronics & Optoelectronics, 2013, Vol 16, Issue 4, p322
- ISSN
1560-8034
- Publication type
Article