The morphology of graphene sheets treated in an ozone generator

Haihua Tao, Joel Moser, Francesc Alzina, Q. Wang, C. M. Sotomayor-Torres

Research output: Contribution to journalArticleResearchpeer-review

57 Citations (Scopus)


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 languageEnglish
Pages (from-to)18257-18260
JournalJournal of Physical Chemistry C
Issue number37
Publication statusPublished - 22 Sept 2011


Dive into the research topics of 'The morphology of graphene sheets treated in an ozone generator'. Together they form a unique fingerprint.

Cite this