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

Figure 2

SEM images of the aligned N-MWCNTs grew over Si/SiO₂ substrates displaying the different morphologies observed in our samples: (a) typical morphology of N-MWCNTs produced with acetone in the trap (); (b) N-MWCNTs fabricated using deionized water in the trap (); (c) image showing tip morphology of N-MWCNTs formed when an aqueous solution of NaCl is used (1.0 wt.% case; ); (d) image of N-MWCNTs in the case of case: here lumps are the main defects detected; (e) image of case (aqueous solution of NaCl 26.92 wt.%): complex structures are observed with very thin CNTs; (f) root part of : N-MWCNTs also fabricated with aqueous solution of NaCl 26.92 wt.%, showing dramatic changes in the catalytic nanoparticles. More related SEM figures can be seen in SI (Figure S4).

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