Investigation of Low-Pressure Bimetallic Cobalt-Iron Catalyst-Grown Multiwalled Carbon Nanotubes and Their Electrical Properties

Figure 2

(a) SEM images of MWCNTs grown on Co₂₀Fe₈₀ and Co₅₀Fe₅₀ catalyst thickness of 4 nm at different pressures for 5 min. (b) High-frequency Raman spectrum (473 nm excitation) of MWCNT at 4 nm thick catalyst. The relative ratio of the Raman bands (𝐼_𝐺/𝐼_𝐷) reflects the quality of the presence of nanotubes.

(a)

(b)