Fluorination of multiwall nitrogen-doped carbon nanotubes
| Autor: | E. M. Pazhetnov, Lyubov G. Bulusheva, Alexander V. Okotrub, O. G. Abrosimov, A. G. Kudashov, N. A. Rudina, Andrei I. Boronin, N. F. Yudanov |
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| Rok vydání: | 2006 |
| Předmět: |
Materials science
Silicon Materials Science (miscellaneous) Inorganic chemistry Selective chemistry of single-walled nanotubes chemistry.chemical_element Substrate (electronics) Carbon nanotube law.invention Inorganic Chemistry Optical properties of carbon nanotubes Condensed Matter::Materials Science chemistry X-ray photoelectron spectroscopy law Physics::Atomic and Molecular Clusters Fluorine Physics::Chemical Physics Physical and Theoretical Chemistry Nuclear Experiment Carbon Astrophysics::Galaxy Astrophysics |
| Zdroj: | Russian Journal of Inorganic Chemistry. 51:613-618 |
| ISSN: | 1531-8613 0036-0236 |
| Popis: | A film of oriented nitrogen-doped multiwall carbon nanotubes was grown on a silicon substrate as a result of the thermolysis of an acetonitrile + ferrocene mixture. The fluorination of the film by BrF3 vapor at room temperature removed the substrate; however, the vertical orientation of the nanotubes was not destroyed. Analysis of micrographs of a fluorinated sample obtained with a high-resolution transmission electron micro-scope showed that only the surface walls of the nanotubes were fluorinated. The fluorine concentration of the product as determined from X-ray photoelectron spectroscopy was about 16%. A comparison of the N1s spectra of the starting and fluorinated samples showed that the nitrogen atoms of CNx nanotubes changed their electronic state as a result of fluorination. Matching of the X-ray photoelectron spectroscopic data with the results of quantum-chemical calculations for fragments of fluorinated nitrogen-doped nanotubes showed that fluorine atoms preferred to attach to pyridine-like nitrogen atoms or to carbon atoms in the ortho or meta positions relative to a nitrogen atom. |
| Databáze: | OpenAIRE |
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