Toughness and strength of nanocrystalline graphene

Shekhawat, Ashivni; Ritchie, Robert O.

doi:10.1038/ncomms10546

Toughness and strength of nanocrystalline graphene

Journal Article · Thu Jan 28 00:00:00 EST 2016 · Nature Communications

DOI:https://doi.org/10.1038/ncomms10546· OSTI ID:1255548

Shekhawat, Ashivni ^[1]; Ritchie, Robert O. ^[2]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States); Miller Institute for Basic Research in Science, Berkeley, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)

Pristine monocrystalline graphene is claimed to be the strongest material known with remarkable mechanical and electrical properties. However, graphene made with scalable fabrication techniques is polycrystalline and contains inherent nanoscale line and point defects—grain boundaries and grain-boundary triple junctions—that lead to significant statistical fluctuations in toughness and strength. These fluctuations become particularly pronounced for nanocrystalline graphene where the density of defects is high. Here we use large-scale simulation and continuum modelling to show that the statistical variation in toughness and strength can be understood with ‘weakest-link’ statistics. We develop the first statistical theory of toughness in polycrystalline graphene, and elucidate the nanoscale origins of the grain-size dependence of its strength and toughness. Lastly, our results should lead to more reliable graphene device design, and provide a framework to interpret experimental results in a broad class of two-dimensional materials.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1255548

Alternate ID(s):: OSTI ID: 1415954

Journal Information:: Nature Communications, Journal Name: Nature Communications Vol. 7; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Scaling properties of polycrystalline graphene: a review Isacsson, Andreas; Cummings, Aron W.; Colombo, Luciano 2D Materials, Vol. 4, Issue 1 https://doi.org/10.1088/2053-1583/aa5147	journal	December 2016
Tailoring the mechanical properties of 2D materials and heterostructures Androulidakis, Charalampos; Zhang, Kaihao; Robertson, Matthew 2D Materials, Vol. 5, Issue 3 https://doi.org/10.1088/2053-1583/aac764	journal	June 2018
Revealing the 3D structure of graphene defects Hofer, Christoph; Kramberger, Christian; Monazam, Mohammad Reza Ahmadpour 2D Materials, Vol. 5, Issue 4 https://doi.org/10.1088/2053-1583/aaded7	journal	September 2018
Stretchability of PMMA-supported CVD graphene and of its electrical contacts Jang, Hongwoo; Dai, Zhaohe; Ha, Kyoung-Ho 2D Materials, Vol. 7, Issue 1 https://doi.org/10.1088/2053-1583/ab4c0f	journal	October 2019
Nanomechanics of graphene Wei, Yujie; Yang, Ronggui National Science Review, Vol. 6, Issue 2 https://doi.org/10.1093/nsr/nwy067	journal	June 2018
A review on graphene-based polymer composite coatings for the corrosion protection of metals Hussain, Ahmed Khalid; Sudin, Izman; Basheer, Uday M. Corrosion Reviews, Vol. 37, Issue 4 https://doi.org/10.1515/corrrev-2018-0097	journal	August 2019
A Review on Brittle Fracture Nanomechanics by All-Atom Simulations Patil, Sandeep P.; Heider, Yousef Nanomaterials, Vol. 9, Issue 7 https://doi.org/10.3390/nano9071050	journal	July 2019
Revealing the 3D Structure of Graphene Defects Hofer, Christoph; Kramberger, Christian; Monazam, Mohammad Reza Ahmadpour arXiv https://doi.org/10.48550/arxiv.1807.00677	preprint	January 2018
Mechanical Properties of Atomically Thin Boron Nitride and the Role of Interlayer Interactions Falin, Aleksey; Cai, Qiran; Santos, Elton J. G. arXiv https://doi.org/10.48550/arxiv.2008.01657	text	January 2020

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