Graphene nanoribbons exfoliated from graphite surface dislocation bands by electrostatic force

We have developed a novel technique to produce long and narrow graphene ribbons with smooth edges. This technique is free of any chemical treatments and involves a combination of two steps: (i) creation of surface dislocation ribbons by high velocity clusters impacting the graphite surface and (ii)...

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Bibliographic Details
Published in:Nanotechnology 2010-05, Vol.21 (19), p.195704-195704
Main Authors: Sidorov, Anton N, Bansal, Tanesh, Ouseph, P J, Sumanasekera, Gamini
Format: Article
Language:English
Subjects:
Charge transfer
Clusters
Dislocations
Electrostatics
Graphene
Graphite
Nanostructure
Nitrous oxides
Ribbons
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Summary:We have developed a novel technique to produce long and narrow graphene ribbons with smooth edges. This technique is free of any chemical treatments and involves a combination of two steps: (i) creation of surface dislocation ribbons by high velocity clusters impacting the graphite surface and (ii) electrostatic transferring of the dislocation ribbons to a desired substrate. The width of the ribbons can be controlled by varying the impact velocity of a cluster jet stream from a gas jet impactor. The electrical transport properties were investigated on the ribbons in field effect transistor (FET) configuration. The p-type behavior observed under ambient conditions was found to be reversed upon annealing at 180 degrees C in a vacuum of 10( - 7) Torr. Charge transfer effects were observed when the degassed graphene was exposed to N(2)O and NH(3).
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/21/19/195704