| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1416139 | Carbon | 2011 | 8 Pages |
Abstract
A simple and effective stepwise-method has been developed to remove defects from the top graphene layers of highly orientated pyrolytic graphite. Using a combination of ozone exposure and moderately high temperature we have shown that a defect-rich graphite surface can be modified to generate a graphene-like surface containing a negligible amount of oxygen, hydrogen and sp3 carbon. We report definitive X-ray photoelectron and X-ray absorption spectroscopy analysis after each stage of the process, suggest a mechanism by which the modification occurs and propose it as a route towards the preparation or manipulation of pristine graphene samples.
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Authors
M.J. Webb, P. Palmgren, P. Pal, O. Karis, H. Grennberg,