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Ruoff, Rodney S.
Center for Multidimensional Carbon Materials (CMCM)
Research Interests
  • Next generation carbons, ultrathin sp3-bonded carbon sheets, negative curvature (‘Schwartzites’) carbons, sp3/sp2 hybrid carbon materials, model compounds for novel carbon materials, reaction mechanisms

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Folding and Fracture of Single-Crystal Graphene Grown on a Cu(111) Foil

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Title
Folding and Fracture of Single-Crystal Graphene Grown on a Cu(111) Foil
Author
Luo, DaChoe, MyeonggiBizao, Rafael A.Wang, MeihuiSu, HaishengHuang, MingJin, SunghwanLi, YunqingKim, MinhyeokPugno, Nicola M.Ren, BinLee, ZonghoonRuoff, Rodney S.
Issue Date
2022-04
Publisher
WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Citation
ADVANCED MATERIALS, v.34, no.15, pp.2110509
Abstract
A single-crystal graphene film grown on a Cu(111) foil by chemical vapor deposition (CVD) has ribbon-like fold structures. These graphene folds are highly oriented and essentially parallel to each other. Cu surface steps underneath the graphene are along the and directions, leading to the formation of the arrays of folds. The folds in the single-layer graphene (SLG) are not continuous but break up into alternating patterns. A "joint" (an AB-stacked bilayer graphene) region connects two neighboring alternating regions, and the breaks are always along zigzag or armchair directions. Folds formed in bilayer or few-layer graphene are continuous with no breaks. Molecular dynamics simulations show that SLG suffers a significantly higher compressive stress compared to bilayer graphene when both are under the same compression, thus leading to the rupture of SLG in these fold regions. The fracture strength of a CVD-grown single-crystal SLG film is simulated to be about 70 GPa. This study greatly deepens the understanding of the mechanics of CVD-grown single-crystal graphene and such folds, and sheds light on the fabrication of various graphene origami/kirigami structures by substrate engineering. Such oriented folds can be used in a variety of further studies.
URI
https://scholarworks.unist.ac.kr/handle/201301/57677
URL
https://onlinelibrary.wiley.com/doi/10.1002/adma.202110509
DOI
10.1002/adma.202110509
ISSN
0935-9648
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MSE_Journal Papers
CHM_Journal Papers
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