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Nano Lett. 2012 Mar 14;12(3):1448-52. doi: 10.1021/nl204123h. Epub 2012 Feb 22.

Direct measurement of adhesion energy of monolayer graphene as-grown on copper and its application to renewable transfer process.

Author information

1
Department of Mechanical Engineering, KAIST, Daejeon 305-701, Korea.

Abstract

Direct measurement of the adhesion energy of monolayer graphene as-grown on metal substrates is important to better understand its bonding mechanism and control the mechanical release of the graphene from the substrates, but it has not been reported yet. We report the adhesion energy of large-area monolayer graphene synthesized on copper measured by double cantilever beam fracture mechanics testing. The adhesion energy of 0.72 ± 0.07 J m(-2) was found. Knowing the directly measured value, we further demonstrate the etching-free renewable transfer process of monolayer graphene that utilizes the repetition of the mechanical delamination followed by the regrowth of monolayer graphene on a copper substrate.

PMID:
22335825
DOI:
10.1021/nl204123h
[Indexed for MEDLINE]

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