Development of graphene layers by reduction of graphite fluoride C2 F surface
| Autor: | Z. Osváth, T. I. Nedoseikina, K. S. Babin, Igor P. Asanov, P. N. Gevko, Alexander V. Okotrub, L. P. Biró, Lyubov G. Bulusheva, N. F. Yudanov, A. V. Gusel’nikov |
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| Rok vydání: | 2009 |
| Předmět: |
Chemistry
Graphene Intercalation (chemistry) Analytical chemistry Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention symbols.namesake chemistry.chemical_compound X-ray photoelectron spectroscopy Highly oriented pyrolytic graphite law symbols Graphite Raman spectroscopy Fluoride Graphene oxide paper |
| Zdroj: | physica status solidi (b). 246:2545-2548 |
| ISSN: | 0370-1972 |
| DOI: | 10.1002/pssb.200982296 |
| Popis: | We studied a possibility of reduction of the surface of graphite fluoride obtained by fluorination of highly oriented pyrolytic graphite (HOPG) by a gaseous mixture of BrF 3 and Br 2 - X-ray diffraction (XRD) revealed a layered structure of the fluorinated product being a second-stage intercalate due to a presence of bromine molecules between the fluorinated graphite layers. Scanning tunneling microscopy and spectroscopy showed that the "old" surface of graphite fluoride (exposed to the ambient air) has the graphite-like structure, while the fresh cleaved surface is non-conductive. Therefore, the outer layers of graphite fluoride can be reduced by water present in the laboratory atmosphere. The sample was treated by H 2 O vapor to confirm that. The reduction was controlled by Raman spectroscopy using intensity of the 1360 and 1580 cm -1 bands. The energy dependent photoelectron spectroscopy was used for estimation of thickness of the reduction layer, which was found, does not exceed 2-3 graphite layers. The obtained results indicate the possibility of synthesis of graphene layers on dielectric fluorinated graphite matrix. |
| Databáze: | OpenAIRE |
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