G-band resonant Raman study of 62 isolated single-wall carbon nanotubes

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Diamond/carbon nanotube composites: Raman, FTIR and XPS spectroscopic studies (2017, background): “This may be because the high power irradiation not only increases the mean diameter but also reduces the diameter distribution of nanotubes in the sample [43,45].”
Raman spectroscopy of carbon nanotubes (2005, methodology): “54 eV laser lines were used to obtain the G-band experimental results used in the fitting procedure [47].”
Raman characterization of defects and dopants in graphene (2015, background): “For graphene and graphite these two modes are degenerate, but the degeneracy can be lifted by rolling the graphene sheet into a carbon nanotube, which splits the G band into the G+ and G− bands [34].”
Raman Spectroscopy in Graphene-Based Systems: Prototypes for Nanoscience and Nanometrology (2012, unknown): “empirical models [42, 43].”
Analyzing the Raman Spectra of Graphenic Carbon Materials from Kerogens to Nanotubes: What Type of Information Can Be Extracted from Defect Bands? (2019, background): “In the absence of any distinctive RBM signal (overwhelmed by the signal from the substrate [39]) and knowing the expected range of the nanotube diameter, it is possible to determine accurately the actual nanotube diameter thanks to the value of the wavenumber gap between the G+ and the G- subbands.”