Coupled thermogravimetry, mass spectrometry, and infrared spectroscopy for quantification of surface functionality on single-walled carbon nanotubes

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DOIResolve DOI: http://doi.org/10.1007/s00216-009-3205-y
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TypeArticle
Journal titleAnalytical and Bioanalytical Chemistry
Volume396
Issue3
Pages10371044; # of pages: 8
SubjectSingle-walled carbon nanotubes; Functionalization; Thermogravimetric analysis; ICP-OES; TG-MS-FTIR
AbstractWe have successfully applied coupled thermogravimetry, mass spectrometry, and infrared spectroscopy to the quantification of surface functional groups on single-walled carbon nanotubes. A high-purity single-walled carbon nanotube sample was subjected to a rapid functionalization reaction that attached butyric acid moieties to the nanotube sidewalls. This sample was then subjected to thermal analysis under inert desorption conditions. Resultant infrared and mass spectrometric data were easily utilized to identify the desorption of the butyric acid groups across a narrow temperature range and we were able to calculate the degree of substitution of the attached acid groups within the nanotube backbone as 1.7 carbon atoms per hundred, in very good agreement with independent analytical measurements made by inductively coupled plasma optical emission spectrometry (ICP-OES). The thermal analysis technique was also able to discern the presence of secondary functional moieties on the nanotube samples that were not accessible by ICP-OES. This work demonstrates the potential of this technique for assessing the presence of multiple and diverse functional addends on the nanotube sidewalls, beyond just the principal groups targeted by the specific functionalization reaction.
Publication date
LanguageEnglish
AffiliationNRC Steacie Institute for Molecular Sciences; National Research Council Canada; NRC Institute for National Measurement Standards
Peer reviewedYes
NPARC number17653088
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Record identifier3bfbe990-275e-4a6b-b8b7-c18dd5751914
Record created2011-04-01
Record modified2016-05-09
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