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Bittencourt, C., Van Lier, G., Ke, X., Suarez-Martinez, I., Felten, A., Ghijsen, J., Van Tendeloo, G. & Ewels, C. P. (2009) Spectroscopy and Defect Identification for Fluorinated Carbon Nanotubes. ChemPhysChem, 10 920–925.
Added by: Laurent Cournède (2016-03-10 21:41:24) |
| Type de référence: Article DOI: 10.1002/cphc.200800851 Numéro d'identification (ISBN etc.): 1439-4235 Clé BibTeX: Bittencourt2009 Voir tous les détails bibliographiques  |
Catégories: PMN Mots-clés: cf4 rf-plasma, fluorine, gold, nanotubes, Photoelectron spectroscopy, photoelectron-spectroscopy, photoemission, plasma chemistry, x-ray Créateurs: Bittencourt, Ewels, Felten, Ghijsen, Ke, Suarez-Martinez, Van Lier, Van Tendeloo Collection: ChemPhysChem |
Consultations : 12/866
Indice de consultation : 5% Indice de popularité : 1.25% |
| Résumé |
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Multi-wall carbon nanotubes (MWCNTs) were exposed to a CF4 radio-frequency (rf) plasma. High-resolution photoelectron spectroscopy shows that the treatment effectively grafts fluorine atoms onto the MWCNTs, altering the valence electronic states. Fluorine surface concentration can be tuned by varying the exposure time. Evaporation of gold onto MWCNTs is used to mark active site formation. High-resolution transmission electron microscopy coupled with density functional theory (DFT) modelling is used to characterise the surface defects formed, indicating that the plasma treatment does not etch the tube surface. We suggest that this combination of theory and microscopy of thermally evaporated gold atoms onto the CNT surface may be a powerful approach to characterise both surface defect density as well as defect type.
Added by: Laurent Cournède |