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

Figure 10

Resistance behavior of synthesized with different substances in the residual bubbler of CVD setup. (a) Black line corresponds to (acetone), red line to (water), and blue line to (aqueous solution of 1 wt.% of NaCl) and (b) red line corresponds to (aqueous solution of 15.48 wt.% of NaCl) and orange line to (aqueous solution of 26.92 wt.% of NaCl). Resistances of , , and have typical semiconducting behavior. At the same time, the samples prepared with aqueous solution NaCl in the residual bubbler show metallic response above 20 K and semiconducting behavior at very low temperature.

(a)

(b)