Type- and species-selective air etching of single-walled carbon nanotubes tracked with in situ Raman spectroscopy

Alternative titleType and species selective air etching of single-walled carbon nanotubes tracked with in situ Raman spectroscopy
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DOIResolve DOI: http://doi.org/10.1021/nn402412t
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TypeArticle
Journal titleACS Nano
ISSN1936-0851
1936-086X
Volume7
Issue8
Pages65076521; # of pages: 15
Subjectcarbon nanotube combustion; air etching; in situ Raman spectroscopy; purification; chirality
AbstractThe thermal oxidation of carbon nanotubes in air is investigated by in situ Raman spectroscopy. Etching rates are directly seen to be diameter, chirality, and type dependent. We directly track the evolution of bundled nanotube networks that undergo air etching from 300 to 600 °C. Some species are more robust than others. Changes to radial breathing mode (RBM) and G– peak structures suggest that metallic species etch away more rapidly, with smaller diameter semiconducting species etching more slowly and large diameter nanotubes, including semiconductors, etching last. The decay in integrated G and D band intensities is tracked and fit reasonably well with biexponential decay. The RBM evolution is better represented by a single exponential. All bands are fit to activation plots with RBMs showing significantly different rates.
Publication date
PublisherACS
LanguageEnglish
AffiliationSecurity and Disruptive Technologies; National Research Council Canada
Peer reviewedYes
NPARC number21269013
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Record identifiera2ee36a2-be32-4ca9-bdca-a39239689c7b
Record created2013-11-30
Record modified2016-05-09
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