Water-Dispersible Multiwalled Carbon Nanotubes Obtained from Citric-Acid-Assisted Oxygen Plasma Functionalization

Figure 4

TEM images of the (a) and (b) 𝑝-MWCNTs, (c) and (d) 𝑠-MWCNTs, and (e) and (f) 𝑓-MWCNTs at different magnifications taken at an accelerating voltage of 100 kV. Insets of (b), (d), and (f) are showing higher magnification images. (g) Average MWCNT length (𝐿_MWCNT) measured from more than 30 MWCNTs in each sample from several TEM images.

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