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Atomic and electronic structure of a copper/graphene interface as prepared and 1.5 years after

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Title
Atomic and electronic structure of a copper/graphene interface as prepared and 1.5 years after
Author(s)
D.W. Boukhvalov; P.F. Bazylewski; A.I. Kukharenko; I.S. Zhidkov; Yu. S. Ponosov; E.Z. Kurmaev; S.O. Cholakh; Y.H. Lee; G.S. Chang
Publication Date
2017-12
Journal
APPLIED SURFACE SCIENCE, v.426, no., pp.1167 - 1172
Publisher
ELSEVIER SCIENCE BV
Abstract
We report the results of X-ray spectroscopy and Raman measurements of as-prepared graphene on a high quality copper surface and the same materials after 1.5 years under different conditions (ambient and low humidity). The obtained results were compared with density functional theory calculations of the formation energies and electronic structures of various structural defects in graphene/Cu interfaces. For evaluation of the stability of the carbon cover, we propose a two-step model. The first step is oxidation of the graphene, and the second is perforation of graphene with the removal of carbon atoms as part of the carbon dioxide molecule. Results of the modeling and experimental measurements provide evidence that graphene grown on high-quality copper substrate becomes robust and stable in time (1.5 years). However, the stability of this interface depends on the quality of the graphene and the number of native defects in the graphene and substrate. The effect of the presence of a metallic substrate with defects on the stability and electronic structure of graphene is also discussed © 2017 Elsevier B.V. All rights reserved.
URI
https://pr.ibs.re.kr/handle/8788114/3840
ISSN
0169-4332
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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