Characterisation, coverage, and orientation of functionalised graphene using sum-frequency generation spectroscopy
| Autor: | Huda S. AlSalem, Sven P. K. Koehler, Chloe Holroyd, Melissa Danial Iswan, Melissa A. Denecke, Andrew B. Horn |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Summenfrequenzerzeugung General Physics and Astronomy 02 engineering and technology 010402 general chemistry Photochemistry 01 natural sciences Nichtlinerae Spektroskopie law.invention chemistry.chemical_compound National Graphene Institute law Monolayer Dalton Nuclear Institute Physical and Theoretical Chemistry Spectroscopy Benzene Graphene Substrate (chemistry) 021001 nanoscience & nanotechnology Resonance (chemistry) Graphen Funktionalisierung 0104 chemical sciences ResearchInstitutes_Networks_Beacons/dalton_nuclear_institute chemistry Covalent bond ResearchInstitutes_Networks_Beacons/national_graphene_institute ddc:660 Phenylgruppe 660 Technische Chemie 0210 nano-technology Sum frequency generation spectroscopy |
| Zdroj: | AlSalem, H S, Holroyd, C, Danial Iswan, M, Horn, A B, Denecke, M A & Koehler, S P K 2018, ' Characterisation, coverage, and orientation of functionalised graphene using sum-frequency generation spectroscopy ', Phys. Chem. Chem. Phys., vol. 20, pp. 8962-8967 . https://doi.org/10.1039/C7CP07991E |
| DOI: | 10.1039/C7CP07991E |
| Popis: | We report the unambiguous detection of phenyl groups covalently attached to functionalised graphene using non-linear spectroscopy. Sum-frequency generation was employed to probe graphene on a gold surface after chemical functionalisation using a benzene diazonium salt. We observe a distinct resonance at 3064 cm-1 which can clearly be assigned to an aromatic C-H stretch by comparison with a self-assembled monolayer on a gold substrate formed from benzenethiol. Not only does sum-frequency generation spectroscopy allow one to characterise functionalised graphene with higher sensitivity and much better specificity than many other spectroscopic techniques, but it also opens up the possibility to assess the coverage of graphene with functional groups, and to determine their orientation relative to the graphene surface. |
| Databáze: | OpenAIRE |
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