Title
Spectroscopy and defect identification for fluorinated carbon nanotubes Spectroscopy and defect identification for fluorinated carbon nanotubes
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Weinheim ,
Subject
Physics
Source (journal)
ChemPhysChem: a European journal of chemical physics and physical chemistry. - Weinheim
Volume/pages
10(2009) :6 , p. 920-925
ISSN
1439-4235
ISI
000265469200011
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
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.
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