Figure 3: Morphology characterization.
(a–c) The SEM images, and (d–f) the AFM images of the pristine SWNT film (a,d), the SWNT film doped with 0.5 wt.% PEI (b,e) and the SWNT film doped with 1 wt.% PEI (c,f).
Figure 3: Morphology characterization. | Nature Communications
