Abstract
Using atomic force microscopy and Raman spectroscopy, we characterize the highly disordered morphology of single-layer and multilayer graphene sheets that results from long exposures to ozone molecules and oxygen radicals in an ozone generator. We identify a crossover from a nanocrystalline phase to an amorphous carbon phase in single-layer graphene as the exposure time is increased. We then consider the nanocrystalline phase and compare the morphology of single-layer sheets, multilayer sheets, and graphite flakes. Finally, we find that salient structures, such as steps and folds, act as sinks for disorder. © 2011 American Chemical Society.
Original language | English |
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Pages (from-to) | 18257-18260 |
Journal | Journal of Physical Chemistry C |
Volume | 115 |
Issue number | 37 |
DOIs | |
Publication status | Published - 22 Sept 2011 |