Fig. 3

Evolution of Raman spectra of oxidised carbon nanomaterials. The progressive changes in the spectral features of GO, OxMWNT and OxNH are shown at Days 0, 1, 2, 3, 5 and 7, when incubated in a H2O and b NaClO 1%. At each time point the spectra is given in a different colour for clarity. c The average change in the I D/I G ratio over time for each CNM (GO—Green, OxMWNT—Blue and OxNH—Red) when incubated in NaClO 1% is given in C. Error bars have also been presented for each material in the respective colours at each time point (n = 30 measurements). All averaged individual Raman spectra have been presented in Supplementary Figs. S6-S8