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Wood, Harvey, Wang - 2017 - Adhesion toughness of multilayer graphene membranes combined.pdf (759.5 kB)

Adhesion toughness of multilayer graphene films

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journal contribution
posted on 2017-12-08, 09:39 authored by Joseph D. Wood, Christopher HarveyChristopher Harvey, Simon WangSimon Wang
Interface adhesion toughness between multilayer graphene films and substrates is a major concern for their integration into functional devices. Results from the circular blister test, however, display seemingly anomalous behaviour as adhesion toughness depends on number of graphene layers. Here we show that interlayer shearing and sliding near the blister crack tip, caused by the transition from membrane stretching to combined bending, stretching and through-thickness shearing, decreases fracture mode mixity GII/GI, leading to lower adhesion toughness. For silicon oxide substrate and pressure loading, mode mixity decreases from 232% for monolayer films to 130% for multilayer films, causing the adhesion toughness Gc to decrease from 0.424 J m−2 to 0.365 J m−2. The mode I and II adhesion toughnesses are found to be GIc = 0.230 J m−2 and GIIc = 0.666 J m−2, respectively. With point loading, mode mixity decreases from 741% for monolayer films to 262% for multilayer films, while the adhesion toughness Gc decreases from 0.543 J m−2 to 0.438 J m−2.

Funding

This work was supported by the UK Engineering and Physical Sciences Research Council (EPSRC) under grant reference EP/M000958/1.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

Nature Communications

Volume

8

Citation

WOOD, J.D., HARVEY, C.M. and WANG, S., 2017. Adhesion toughness of multilayer graphene films. Nature Communications, 8, 1952.

Publisher

Nature Publishing Group © The Author(s)

Version

  • VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

Acceptance date

2017-11-07

Publication date

2017-12-05

Notes

This is an Open Access Article. It is published by Nature Publishing Group under the Creative Commons Attribution 4.0 International Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

ISSN

2041-1723

eISSN

2041-1723

Language

  • en

Article number

1952