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Bulusheva, L. G., Fedoseeva, Y. V., Okotrub, A. V., Flahaut, E., Asanov, I. P., Koroteev, V. O., Yaya, A., Ewels, C. P., Chuvilin, A. L., Felten, A., Van Lier, G. & Vyalikh, D. V. (2010) Stability of Fluorinated Double-Walled Carbon Nanotubes Produced by Different Fluorination Techniques. Chem. Mat. 22 4197–4203.
Added by: Laurent Cournède (2016-03-10 21:37:32) |
| Type de référence: Article DOI: 10.1021/cm100677c Numéro d'identification (ISBN etc.): 0897-4756 Clé BibTeX: Bulusheva2010 Voir tous les détails bibliographiques  |
Catégories: PMN Mots-clés: absorption, behavior, identification, photoelectron, plasma, raman-spectroscopy, single, x-ray Créateurs: Asanov, Bulusheva, Chuvilin, Ewels, Fedoseeva, Felten, Flahaut, Koroteev, Okotrub, Van Lier, Vyalikh, Yaya Collection: Chem. Mat. |
Consultations : 1/656
Indice de consultation : 4% Indice de popularité : 1% |
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Double-walled carbon nanotubes (DWCNTs) have been fluorinated using (1) gaseous F(2) at 200 degrees C, (2) a mixture of BrF(3) and Br(2) at room temperature, and (3) radio frequency CF(4) plasma. The stability of the resultant samples was examined by thermogravimetric analysis in an inert atmosphere and by comparing the X-ray photoelectron spectra of the pristine samples with those after heating in vacuum at either 70 degrees C for 10 h or 120 degrees C for 20 h. The DWCNTs fluorinated by F(2) showed the highest stability (the temperature of decomposition is around 396 degrees C), while the BrF(3) and plasma-fluorinated DWCNTs lose fluorine from 150 degrees C. Prolonged annealing of the fluorinated DWCNTs in vacuum at a temperature below 150 degrees C also resulted in the defluorination of the samples. Fluorine atoms leave the DWCNT surface together with carbon atoms leading to defects in the graphitic network. These defects are likely to be centers for later functionalization by oxygen-containing groups during DWCNT storage.
Added by: Laurent Cournède |