Imaging the reactivity and width of graphene's boundary region

The reactivity of graphene at its boundary region has been imaged using non-linear spectroscopy to address the controversy whether the terraces of graphene or its edges are more reactive. Graphene was functionalised with phenyl groups, and we subsequently scanned our vibrational sum-frequency genera...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2020-08, Vol.56 (67), p.9612-9615
Main Authors: AlSalem, Huda S, Al-Goul, Soha T, García-Miranda Ferrari, Alejandro, Brownson, Dale A. C, Velarde, Luis, Koehler, Sven P. K
Format: Article
Language:English
Subjects:
Graphene
Reactivity
Terraces
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Summary:The reactivity of graphene at its boundary region has been imaged using non-linear spectroscopy to address the controversy whether the terraces of graphene or its edges are more reactive. Graphene was functionalised with phenyl groups, and we subsequently scanned our vibrational sum-frequency generation setup from the functionalised graphene terraces across the edges. A greater phenyl signal is clearly observed at the edges, showing evidence of increased reactivity in the boundary region. We estimate an upper limit of 1 mm for the width of the CVD graphene boundary region. The reactivity of graphene at its boundary region has been imaged using non-linear spectroscopy to address the controversy whether the terraces of graphene or its edges are more reactive.
ISSN:1359-7345
1364-548X
DOI:10.1039/d0cc02675a