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Ruoff, Rodney S.
Center for Multidimensional Carbon Materials (CMCM)
Research Interests
  • Next generation carbons, ultrathin sp3-bonded carbon sheets, negative curvature (‘Schwartzites’) carbons, sp3/sp2 hybrid carbon materials, model compounds for novel carbon materials, reaction mechanisms

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Selective mechanical transfer of graphene from seed copper foil using rate effects

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Title
Selective mechanical transfer of graphene from seed copper foil using rate effects
Author
Na, Seung RyulSuk, Ji WonTao, LiAkinwande, DejiRuoff, Rodney S.Huang, RuiLiechti, Kenneth M.
Issue Date
2015-02
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.9, no.2, pp.1325 - 1335
Abstract
A very fast, dry transfer process based on mechanical delamination successfully effected the transfer of large-area, CVD grown graphene on copper foil to silicon. This has been achieved by bonding silicon backing layers to both sides of the graphene-coated copper foil with epoxy and applying a suitably high separation rate to the backing layers. At the highest separation rate considered (254.0 μm/s), monolayer graphene was completely transferred from the copper foil to the target silicon substrate. On the other hand, the lowest rate (25.4 μm/s) caused the epoxy to be completely separated from the graphene. Fracture mechanics analyses were used to determine the adhesion energy between graphene and its seed copper foil (6.0 J/m2) and between graphene and the epoxy (3.4 J/m2) at the respective loading rates. Control experiments for the epoxy/silicon interface established a rate dependent adhesion, which supports the hypothesis that the adhesion of the graphene/epoxy interface was higher than that of the graphene/copper interface at the higher separation rate, thereby providing a controllable mechanism for selective transfer of graphene in future nanofabrication systems such as roll-to-roll transfer
URI
https://scholarworks.unist.ac.kr/handle/201301/10988
URL
http://pubs.acs.org/doi/abs/10.1021/nn505178g
DOI
10.1021/nn505178g
ISSN
1936-0851
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PHY_Journal Papers
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