TY - JOUR
T1 - Spectroscopy and defect identification for fluorinated carbon nanotubes
AU - Bittencourt, Carla
AU - Van Lier, Gregory
AU - Ke, Xiaoxing
AU - Suarez-Martinez, Irène
AU - Felten, A.
AU - Ghijsen, J.
AU - Van Tendeloo, Gustaaf
AU - Ewels, Christopher P.
PY - 2009/4/14
Y1 - 2009/4/14
N2 - Multi-wall carbon nanotubes (MWCNTs) were exposed to a CF 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 transmissionelectron 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.
AB - Multi-wall carbon nanotubes (MWCNTs) were exposed to a CF 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 transmissionelectron 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.
UR - http://www.scopus.com/inward/record.url?scp=64749101186&partnerID=8YFLogxK
U2 - 10.1002/cphc.200800851
DO - 10.1002/cphc.200800851
M3 - Article
AN - SCOPUS:64749101186
SN - 1439-4235
VL - 10
SP - 920
EP - 925
JO - ChemPhysChem
JF - ChemPhysChem
IS - 6
ER -