Thinning of multilayer graphene to monolayer graphene in a plasma environment

We present a facile approach to transform multilayer graphene to single-layer graphene in a gradual thinning process. Our technique is based upon gradual etching of multilayer graphene in a hydrogen and nitrogen plasma environment. High resolution transmission microscopy, selected area electron diff...

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Bibliographic Details
Published in:Nanotechnology 2011-01, Vol.22 (2), p.025704-025704
Main Authors: Hazra, K S, Rafiee, J, Rafiee, M A, Mathur, A, Roy, S S, McLauhglin, J, Koratkar, N, Misra, D S
Format: Article
Language:English
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Summary:We present a facile approach to transform multilayer graphene to single-layer graphene in a gradual thinning process. Our technique is based upon gradual etching of multilayer graphene in a hydrogen and nitrogen plasma environment. High resolution transmission microscopy, selected area electron diffraction and Raman spectroscopy confirm the transformation of multilayer graphene to monolayer graphene at a substrate temperature of ∼ 400 °C. The shift in the position of the G-band peak shows a perfect linear dependence with substrate temperature, which indicates a controlled gradual etching process. Selected area electron diffraction also confirmed the removal of functional groups from the graphene surface due to the plasma treatment. We also show that plasma treatment can be used to engineer graphene nanomesh structures.
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/22/2/025704