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Atomically resolved imaging of highly ordered alternating fluorinated graphene
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Kashtiban, Reza J., Dyson, Mark Adam, Nair, Rahul R., Zan, Recep, Wong, Swee L., Ramasse, Quentin, Geim, Andre K., Bangert, Ursel and Sloan, Jeremy (2014) Atomically resolved imaging of highly ordered alternating fluorinated graphene. Nature Communications, Volume 5 . Article number 4902. doi:10.1038/ncomms5902 ISSN 2041-1723.
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Official URL: http://dx.doi.org/10.1038/ncomms5902
Abstract
One of the most desirable goals of graphene research is to produce ordered two-dimensional (2D) chemical derivatives of suitable quality for monolayer device fabrication. Here we reveal, by focal series exit wave reconstruction (EWR), that C2F chair is a stable graphene derivative and demonstrates pristine long-range order limited only by the size of a functionalized domain. Focal series of images of graphene and C2F chair formed by reaction with XeF2 were obtained at 80 kV in an aberration-corrected transmission electron microscope. EWR images reveal that single carbon atoms and carbon–fluorine pairs in C2F chair alternate strictly over domain sizes of at least 150 nm2 with electron diffraction indicating ordered domains ≥0.16 μm2. Our results also indicate that, within an ordered domain, functionalization occurs on one side only as theory predicts. In addition, we show that electron diffraction provides a quick and easy method for distinguishing between graphene, C2F chair and fully fluorinated stoichiometric CF 2D phases.
Item Type: | Journal Article | ||||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||
Journal or Publication Title: | Nature Communications | ||||||||||
Publisher: | Nature Publishing Group | ||||||||||
ISSN: | 2041-1723 | ||||||||||
Official Date: | 16 September 2014 | ||||||||||
Dates: |
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Volume: | Volume 5 | ||||||||||
Article Number: | Article number 4902 | ||||||||||
DOI: | 10.1038/ncomms5902 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access |
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