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

Figure 6

Raman spectra (normalized to the D band) of samples with nickel and cobalt films of different catalyst thickness grown in mixture of 5/495 sccm C₂H₂/Ar for 5 min at 4.148 Torr (same series as in Figure 2).