Growth Mechanism of a Hybrid Structure Consisting of a Graphite Layer on Top of Vertical Carbon Nanotubes

Figure 7

(a) Height of the CNT graphite hybrid structure from 1.9 nm Co in function of the growth time. The extrapolated line intersects the x-axis at 20 s (incubation time); (b) and (c) SEM pictures of CNT with graphite top layer grown for, respectively, 2 and 10 minutes. Acetylene was introduced in the chamber at time t = 0 of the graph.