4.8 Article

Characterization of Single-Walled Carbon Nanotubes by Scanning Transmission X-ray Spectromicroscopy: Purification, Order and Dodecyl Functionalization

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JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 132, 期 26, 页码 9020-9029

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AMER CHEMICAL SOC
DOI: 10.1021/ja101001t

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  1. NSERC
  2. Canada Research Chair
  3. Canada Foundation for Innovation (CFI)
  4. Canadian Institutes of Health Research (CIHR)
  5. National Research Council (NRC)
  6. University of Saskatchewan
  7. Office of Basic Energy Sciences of the U S Department of Energy [DE-AC03-76SF00098]

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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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