Imaging the Reactivity and Width of Graphene’s Boundary Region

Al Salem, HS; Al-Goul, ST; Ferrari, A; Brownson, DAC; Velarde, L; Koehler, SPK

Abstract

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.

Citation

Al Salem, H., Al-Goul, S., Ferrari, A., Brownson, D., Velarde, L., & Koehler, S. (2020). Imaging the Reactivity and Width of Graphene’s Boundary Region. Chemical Communications, 67, https://doi.org/10.1039/D0CC02675A

• Journal Article Type: Article
• Acceptance Date: Jul 27, 2020
• Publication Date: Jul 28, 2020
• Deposit Date: Jun 12, 2023
• Publicly Available Date: Jun 12, 2023
• Journal: Chemical Communications
• Print ISSN: 1359-7345
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 67
• DOI: https://doi.org/10.1039/D0CC02675A