Title
Direct imaging of light-element impurities in graphene reveals triple-coordinated oxygen
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Abstract
Along with hydrogen, carbon, nitrogen and oxygen are the arguably most important elements for organic chemistry. Due to their rich variety of possible bonding configurations, they can form a staggering number of compounds. Here, we present a detailed analysis of nitrogen and oxygen bonding configurations in a defective carbon (graphene) lattice. Using aberration-corrected scanning transmission electron microscopy and single-atom electron energy loss spectroscopy, we directly imaged oxygen atoms in graphene oxide, as well as nitrogen atoms implanted into graphene. The collected data allows us to compare nitrogen and oxygen bonding configurations, showing clear differences between the two elements. As expected, nitrogen forms either two or three bonds with neighboring carbon atoms, with three bonds being the preferred configuration. Oxygen, by contrast, tends to bind with only two carbon atoms. Remarkably, however, triple-coordinated oxygen with three carbon neighbors is also observed, a configuration that is exceedingly rare in organic compounds.
Keywords
Mechanical and structural properties and devicesTransmission electron microscopy
Object type
Language
English [eng]
Persistent identifier
https://phaidra.univie.ac.at/o:1167838
Appeared in
Title
Nature Communications
Volume
10
ISSN
2041-1723
Issued
2019
Publisher
Springer Science and Business Media LLC
Date issued
2019
Access rights
Rights statement
© The Author(s) 2019
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