Open AccessCharacterization of Single-Walled Carbon Nanotubes by Scanning Transmission X-ray Spectromicroscopy: Purification, Order and Dodecyl Functionalization
Author(s) -
Ebrahim Najafi,
Jian Wang,
Adam P. Hitchcock,
Jingwen Guan,
Stéphane Dénommée,
Benoît Simard
Publication year - 2010
Publication title -
journal of the american chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.115
H-Index - 612
eISSN - 1520-5126
pISSN - 0002-7863
DOI - 10.1021/ja101001t
Subject(s) - surface modification , carbon nanotube , chemistry , dichroic glass , absorption (acoustics) , absorption spectroscopy , analytical chemistry (journal) , nanotechnology , chemical engineering , organic chemistry , materials science , optics , composite material , physics , engineering
The C 1s X-ray absorption spectra of several isolated bundles of single-walled carbon nanotubes (SWCNT) have been measured using scanning transmission X-ray microscopy. First the C 1s and O 1s spectra of a purified but unfunctionalized SWCNT were measured. The C 1s --> pi* transition at 285 eV exhibited almost as strong a dichroic effect (spectral dependence on orientation) as that found in multiwalled carbon nanotubes (Najafi; et al. Small 2008, 7, 2279-2285). Second, purified SWCNT were functionalized with dodecyl and then investigated by STXM. Spectral evidence for the dodecyl functionalization is presented and discussed in comparison to the X-ray absorption spectra of aliphatic hydrocarbons. Both orientation and functionalization mapping of an individual SWCNT bundle is demonstrated.
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