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Nanometer Scale Structures Resulting from Graphite Oxidation

Published online by Cambridge University Press:  21 February 2011

Marilyn J. Nowakowski ,
John M. Vohs  and
Dawn A. Bonnell
Marilyn J. Nowakowski
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104
John M. Vohs
Affiliation:
Department of Chemical Engineering, University of Pennsylvania, Philadelphia, PA 19104
Dawn A. Bonnell
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104
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Abstract

Scanning tunneling microscopy (STM) and spectroscopy (STS) were used to characterize highly oriented pyrolytic graphite (HOPG) which was oxidized by two different methods, furnace heating in atmosphere and immersion in oxygen plasma. The character of the surfaces was found to be dissimilar on a micron scale but comparable on a nanometer scale, at which both appear to be comprised of sharp step edges. Variations in local electronic structure near a step edge were compared.

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References

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