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Comprehensive spectroscopic characterization of high purity metallicity-sorted single-walled carbon nanotubes

Authors/others:Kharlamova, Marianna V.Kramberger, ChristianSauer, MarkusYanagi, Kazuhiro (Tokyo Metropolitan University) Pichler, Thomas
Abstract:We have performed a thorough characterization of 1.4 nm-diameter single-walled carbon nanotubes (SWCNTs) separated according to their metallicity by optical absorption (OAS), X-ray photoelectron (XPS), ultraviolet photoelectron (UPS), and multifrequency Raman spectroscopy. The OAS, XPS, and UPS data prove a high purity (99%) of SWCNTs. The C 1s core level XPS spectra of the separated nanotubes show different spectral widths, asymmetry, and peak positions. The UPS spectra of the samples demonstrate clearly defined van Hove singularities. Significant differences are observed in the Raman spectra of the separated nanotubes. Our findings suggest that for further advances in SWCNT metallicity sorting, Raman spectroscopy has to be applied to assess purity levels beyond the detection limits of OAS, XPS, and UPS.
Date of publication:11.2015
Journal title:Physica Status Solidi. B: Basic Research
Digital Object Identifier (DOI):https://doi.org/10.1002/pssb.201552251
Publication Type:Article
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