On the Suitability of Raman Spectroscopy to Monitor the Degree of Graphene Functionalization by Diazonium Salts
| Autor: | Jan Hošek, Petr Kovaricek, Elena del Corro, Krishna Sampathkumar, Valentin Diez-Cabanes, Martin Kalbac, Otakar Frank, Milan Bousa |
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| Přispěvatelé: | Czech Science Foundation, European Commission, Ministry of Education, Youth and Sports (Czech Republic) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Lattice disorders 02 engineering and technology Decomposition products Functionalizations Strain-induced shifts 010402 general chemistry Graphene lattices 01 natural sciences Degree (temperature) law.invention External strains symbols.namesake law Overlapping effect Physical and Theoretical Chemistry Strain (chemistry) Graphene Functionalized graphene 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Characterization (materials science) General Energy Chemical engineering symbols Surface modification 0210 nano-technology Raman spectroscopy |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Recercat. Dipósit de la Recerca de Catalunya Recercat: Dipósit de la Recerca de Catalunya Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona |
| Popis: | Raman spectroscopy is undoubtedly the most frequently used technique for universal characterization of graphene and related materials. Quantification of parameters like disorder or strain is possible through analysis of particular Raman bands. However, under certain conditions, such evaluation can be jeopardized by—sometimes hidden—convolution of more overlapping effects. In this work, graphene functionalization by the common nitrobenzenediazonium salt under simultaneous biaxial tensile deformation induced by substrate swelling was investigated by Raman spectroscopy. As expected, the disorder-related D band appeared in the spectra documenting the covalent attack on the graphene lattice. However, the strain-induced shift of the graphene bands exposed additional peaks, masked at exactly the same positions as the unstrained graphene bands. The new bands were assigned to vibrations of the diazonium molecule and its decomposition products adsorbed on top of the functionalized graphene. The external strain thus provided means for more correct quantification of the lattice disorder. This work was funded by Czech Science Foundation (GACR 17-18702 S). We also acknowledge the support from the European Regional Development Fund; OP RDE; Project: “Carbon allotropes with rationalized nanointerfaces and nanolinks for environmental and biomedical applications” (No. CZ.02.1.01/0.0/0.0/16_026/0008382). This work was supported by the Ministry of Education, Youth and Sports of the Czech Republic and The European Union - European Structural and Investments Funds in the frame of Operational Programme Research Development and Education - project Pro-NanoEnviCz (Project No. CZ.02.1.01/0.0/0.0/16_013/0001821). |
| Databáze: | OpenAIRE |
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