Purification and Functionalization of Single-Walled Carbon Nanotubes through Different Treatment Procedures

Figure 10

The SEM images of 0.5MSWCNT20 for various treatment times: (a) 2, (b) 5, and (c) 8 h and TEM image of 0.5MSWCNT20 for (d) 5 h treatment times, with a 3 : 1 (v/v) mixture of H₂SO₄ and HNO_3.

(a)

(b)

(c)

(d)