Fig. 2
Optical changes of oxidised carbon nanomaterials over time in NaClO 1%. a Visual appearance and colour of carbon nanomaterials in H2O and in NaClO 1% at time points Day 0, 1, 2, 3, 5 and 7 are shown with controls: NaClO 1% and H2O alone. The colour of oxidised carbon nanomaterials became less obvious over time when dispersed in NaClO 1% (samples were all repeated in triplicate). b UV–Vis was measured at 700 nm for all samples to indicate the degree of light absorption and scattering indicative of the physicochemical state of the dispersions. For OxMWNT and OxNH, there is a decrease in intensity at 700 nm
