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

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• 作者：Ebrahim Najafi ; Jian Wang ; Adam P. Hitchcock ; Jingwen Guan ; Stephane Dnomme ; Benoit Simard
• 刊名：Journal of the American Chemical Society
• 出版年：2010
• 出版时间：July 7, 2010
• 年：2010
• 卷：132
• 期：26
• 页码：9020-9029
• 全文大小：494K
• 年卷期：v.132,no.26(July 7, 2010)
• ISSN：1520-5126

文摘

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 → π* transition at 285 eV exhibited almost as strong a dichroic effect (spectral dependence on orientation) as that found in multiwalled carbon nanotubes (p>Najafi; et al.p> 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.