Characterization of Multiwalled Carbon Nanotubes Dispersing in Water and Association with Biological Effects

Figure 7

Absorption spectra of l-MWCNTs-O₄ under static (a) and centrifugation condition (c); peak 2 wavelength and intensity under static (b) and centrifugation condition (d).

(a)

(b)

(c)

(d)