Mechanical characteristics of individual multi-layer graphene-oxide sheets under direct tensile loading

Wang, C; Peng, Q; Wu, J; He, X; Tong, L; Luo, Q; Li, J; Moody, S; Liu, H; Wang, R; Du, S; Li, Y

Mechanical characteristics of individual multi-layer graphene-oxide sheets under direct tensile loading

Wang, C Peng, Q Wu, J He, X Tong, L Luo, Q

Li, J Moody, S Liu, H Wang, R Du, S Li, Y

Permalink

Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Carbon, 2014, 80, (1), pp. 279-289
Issue Date:: 2014-01-01

Closed Access

	Filename	Description	Size
	Mechanical characteristics of individual multi-layer graphene-oxide sheets under direct tensile loading.pdf	Published version	3.4 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Wang, C
dc.contributor.author	Peng, Q
dc.contributor.author	Wu, J
dc.contributor.author	He, X
dc.contributor.author	Tong, L
dc.contributor.author	Luo, Q https://orcid.org/0000-0001-5727-9290
dc.contributor.author	Li, J
dc.contributor.author	Moody, S
dc.contributor.author	Liu, H
dc.contributor.author	Wang, R
dc.contributor.author	Du, S
dc.contributor.author	Li, Y
dc.date.accessioned	2020-06-02T01:14:39Z
dc.date.available	2020-06-02T01:14:39Z
dc.date.issued	2014-01-01
dc.identifier.citation	Carbon, 2014, 80, (1), pp. 279-289
dc.identifier.issn	0008-6223
dc.identifier.issn	1873-3891
dc.identifier.uri	http://hdl.handle.net/10453/141046
dc.description.abstract	© 2014 Elsevier Ltd. All rights reserved. The mechanical characteristics of graphene oxide (GO) play a critical role in its great applications. In this study, based on the experimental fracture data of individual multilayer freestanding GO sheets under tensile load, in combination with finite element analysis and molecular dynamics (MD) simulations, the failure strength, strain, and Young's modulus are estimated to be 4-5 GPa, 8-15%, and 34-77 GPa, respectively. MD is used to disclose the effects of the structural characteristics of GO on the mechanical properties and failure mechanisms along both the armchair and zigzag directions. The failure strength and Young's modulus of GO are found to slowly decrease with the increase in the ratio of hydroxyl and epoxy groups. The reason is that the breakage of sp3 bonds in the epoxy groups occurs prior to the breakage of sp3 bonds in hydroxyl groups. The former can lead to the formation of heptagonal rings that are able to sustain large strain and insignificantly implicate their surrounding bonds, whereas the latter may result in the complete fracture failure of GO. The fracture of multilayer GO sheets is initiated at the surface sheet due to the intrinsic absence of half-cooperative hydrogen bonding, which may lead to structural instability.
dc.language	English
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartof	Carbon
dc.relation.isbasedon	10.1016/j.carbon.2014.08.066
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	02 Physical Sciences, 03 Chemical Sciences, 09 Engineering
dc.subject.classification	Nanoscience & Nanotechnology
dc.title	Mechanical characteristics of individual multi-layer graphene-oxide sheets under direct tensile loading
dc.type	Journal Article
utslib.citation.volume	80
utslib.for	02 Physical Sciences
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
dc.date.updated	2020-06-02T01:14:32Z
pubs.issue	1
pubs.publication-status	Published
pubs.volume	80
utslib.start-page	279
utslib.citation.issue	1

Abstract:

© 2014 Elsevier Ltd. All rights reserved. The mechanical characteristics of graphene oxide (GO) play a critical role in its great applications. In this study, based on the experimental fracture data of individual multilayer freestanding GO sheets under tensile load, in combination with finite element analysis and molecular dynamics (MD) simulations, the failure strength, strain, and Young's modulus are estimated to be 4-5 GPa, 8-15%, and 34-77 GPa, respectively. MD is used to disclose the effects of the structural characteristics of GO on the mechanical properties and failure mechanisms along both the armchair and zigzag directions. The failure strength and Young's modulus of GO are found to slowly decrease with the increase in the ratio of hydroxyl and epoxy groups. The reason is that the breakage of sp3 bonds in the epoxy groups occurs prior to the breakage of sp3 bonds in hydroxyl groups. The former can lead to the formation of heptagonal rings that are able to sustain large strain and insignificantly implicate their surrounding bonds, whereas the latter may result in the complete fracture failure of GO. The fracture of multilayer GO sheets is initiated at the surface sheet due to the intrinsic absence of half-cooperative hydrogen bonding, which may lead to structural instability.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/141046