Magnetic and Electrical Properties of Nitrogen-Doped Multiwall Carbon Nanotubes Fabricated by a Modified Chemical Vapor Deposition Method

Figure 7

(a) Raman spectra of N-MWCNTs synthesized using different substances in the residual bubbler: acetone (C₃H₆O), water (H₂O), and aqueous solution of NaCl at three weight concentrations (1%, 15.48%, and 26.92%). The RBM: D, G, and G′ modes are listed in each spectrum. The asterisks indicate that some peaks related to the signals come from Si/SiO₂ substrates. Rates (b) and (c) plotted as a function of the sample.

(a)

(b)

(c)