[Retracted] A Methodical Review on Carbon-Based Nanomaterials in Energy-Related Applications

Figure 11

SEM images of graphene produced by arc discharge operating at 150.00 A and 200.00 Torr. (a) No resistive heating. (b) 4.50 V. (c) 7.50 V. (d) 11.00 V [57].

(a)

(b)

(c)

(d)