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Comprehensive spectroscopic characterization of high purity metallicity‐sorted single‐walled carbon nanotubes
Author(s) -
Kharlamova Marianna V.,
Kramberger Christian,
Sauer Markus,
Yanagi Kazuhiro,
Pichler Thomas
Publication year - 2015
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201552251
Subject(s) - carbon nanotube , characterization (materials science) , materials science , metallicity , nanotechnology , chemical engineering , astrophysics , physics , engineering , stars
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.