Orientation-Dependent Strain Relaxation and Chemical Functionalization of Graphene on a Cu(111) Foil

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Title
Orientation-Dependent Strain Relaxation and Chemical Functionalization of Graphene on a Cu(111) Foil
Author(s)
Bao-Wen Li; Da Luo; Liyan Zhu; Xu Zhang; Sunghwan Jin; Ming Huang; Feng Ding; Rodney S. Ruoff
Publication Date
2018-03
Journal
ADVANCED MATERIALS, v.30, no.10, pp.1706504 -
Publisher
WILEY-V C H VERLAG GMBH
Abstract
Epitaxial graphene grown on single crystal Cu(111) foils by chemical vapor deposition is found to be free of wrinkles and under biaxial compressive strain. The compressive strain in the epitaxial regions (0.25-0.40%) is higher than regions where the graphene is not epitaxial with the underlying surface (0.20-0.25%). This orientation-dependent strain relaxation is through the loss of local adhesion and the generation of graphene wrinkles. Density functional theory calculations suggest a large frictional force between the epitaxial graphene and the Cu(111) substrate, and this is therefore an energy barrier to the formation of wrinkles in the graphene. Enhanced chemical reactivity is found in epitaxial graphene on Cu(111) foils as compared to graphene on polycrystalline Cu foils for certain chemical reactions. A higher compressive strain possibly favors lowering the formation energy and/or the energy gap between the initial and transition states, either of which can lead to an increase in chemical reactivity © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
URI
https://pr.ibs.re.kr/handle/8788114/4613
ISSN
0935-9648
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
Files in This Item:
3. Li_et_al-2018-Advanced_Materials.pdfDownload

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