Elimination of D-band in Raman spectra of double-wall carbon nanotubes by oxidation

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Synthesis, characterization, and dye sorption ability of carbon nanotube–biochar nanocomposites (2014, background): “, AOH, AC@O, ACOOH, and AF) within CNT walls [40], and increased ID/IG indicates higher defect concentration (increased functional groups) on the sorbents surface [31].”
Surface and structural characterization of multi-walled carbon nanotubes following different oxidative treatments (2011, background): “[56] Osswald S, Flahaut E, Ye H, Gogotsi Y.”
Evaluating the characteristics of multiwall carbon nanotubes (2011, background): “Note that this peak results from amorphous carbon, not defects, in the tube walls [59,60] 1590 cm 1 G This band corresponds to the tangential vibrations of the graphitic carbon atoms.”
Chemical oxidation of multiwalled carbon nanotubes (2008, background): “[32] Osswald S, Flahaut E, Ye H, Gogotsi Y.”
Effect of Thermal Treatment on the Structure of Multi-walled Carbon Nanotubes (2006, background): “Oxidation of nanotubes will remove amorphous carbon from the samples and improve wetting by creating oxygen-terminated surfaces ( Osswald et al., 2005 ).”