File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

이종훈

Lee, Zonghoon
Atomic-Scale Electron Microscopy Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

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

Author(s)
Luo, DaChoe, MyeonggiBizao, Rafael A.Wang, MeihuiSu, HaishengHuang, MingJin, SunghwanLi, YunqingKim, MinhyeokPugno, Nicola M.Ren, BinLee, ZonghoonRuoff, Rodney S.
Issued Date
2022-04
DOI
10.1002/adma.202110509
URI
https://scholarworks.unist.ac.kr/handle/201301/57677
Fulltext
https://onlinelibrary.wiley.com/doi/10.1002/adma.202110509
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.
Publisher
WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN
0935-9648
Keyword (Author)
graphene foldssingle-crystal graphenecompressive strainCu(111)fracture mechanics
Keyword
TRANSPORTROADMAP

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.