2022
DOI: 10.3390/molecules27061789
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Growth and Characterization of Graphene Layers on Different Kinds of Copper Surfaces

Abstract: Graphene films were grown by chemical vapor deposition on Cu foil. The obtained samples were characterized by Raman spectroscopy, ellipsometry, X-ray photoelectron spectroscopy and electron back-scatter diffraction. We discuss the time-dependent changes in the samples, estimate the thickness of emerging Cu2O beneath the graphene and check the orientation-dependent affinity to oxidation of distinct Cu grains, which also governs the manner in which the initial strong Cu-graphene coupling and strain in the graphe… Show more

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Cited by 4 publications
(3 citation statements)
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“…The main peak at ≈284.6 eV reveals the presence of sp 2 C peak of graphene and the peak at ≈284.9 is assigned to sp 3 carbon. [ 35 ] Another possible assignment is to ascribe the 284.6 eV peak to monolayer graphene in a decoupled state and the 284.9 eV peak to monolayer graphene in a coupled state. [ 36 ] The term “coupled” describes the graphene that is in direct contact with the substrate, while “decoupled” refers to graphene that is separated from the substrate by intercalated atoms.…”
Section: Resultsmentioning
confidence: 99%
“…The main peak at ≈284.6 eV reveals the presence of sp 2 C peak of graphene and the peak at ≈284.9 is assigned to sp 3 carbon. [ 35 ] Another possible assignment is to ascribe the 284.6 eV peak to monolayer graphene in a decoupled state and the 284.9 eV peak to monolayer graphene in a coupled state. [ 36 ] The term “coupled” describes the graphene that is in direct contact with the substrate, while “decoupled” refers to graphene that is separated from the substrate by intercalated atoms.…”
Section: Resultsmentioning
confidence: 99%
“…The spectra taken from the as-grown graphene reflect a uniform picture of strong coupling to the Cu substrate [41], manifested by suppressed Raman intensity and a strong blue shift of the G and the 2D bands (≈10 and ≈35 cm −1 , respectively [39,42]). Multiple enhancement of the intensity of all Raman bands of the graphene in sample S1 is observed as an immediate consequence of the ALD process; however, the blue shift largely remains the same.…”
Section: Raman Analysismentioning
confidence: 91%
“…The ellipsometric data for Ψ and Δ were fitted within a model consisting of three consecutive layers. The first layer is a semi-infinite oblique copper substrate, whose optical constants were determined from measurements on a freshly prepared two-component Cu/graphene system [39]. The second layer is graphene, with the optical constants of graphite taken from Palik's Handbook of Optical Constants [40] (CompleteEASE 5.10 software).…”
Section: Study Of the Al2o3/graphene/cu Heterostructures By Ellipsometrymentioning
confidence: 99%