Synthesis of High-Quality Carbon Nanotube Arrays without the Assistance of Water

Figure 4

(a) Raman spectra of the CNT arrays grown for 10 min, 60 min, and 180 min. (b) Dependence of the 𝐼_𝐷/𝐼_𝐺 on the growth time from the top of the CNT arrays. Here 𝐼_𝐷 and 𝐼_𝐺 correspond to the peak intensities of D-band and G-band, respectively.

(a)

(b)