Protonation and sonication effects on aggregation sensitive Raman features of single wall carbon nanotubes Original Research Article

The G-band and the G′-band (∼2600–2700 cm−1) Raman spectra of single walled carbon nanotubes (SWCNTs) in a sodium dodecyl sulphate aqueous solution were investigated as a function of sonication energy density (ρ). The relative intensity of the G-band feat