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

Figure 4

(a) Sharp N-MWCNTs encapsulating a nanowire longer than 500 nm followed by a cylinder nanoparticle at the tip of the CNT; (b) N-MWCNTs with irregular-shaped metallic nanoparticles; (c) oval-shaped nanoparticle followed by two N-MWCNTs forming a junction; (d) two N-MWCNTs with sharp morphology: one of them has multiple encapsulated metallic nanoparticles; (e) oval lump that shows the graphitic carbon shells formed in the compartments; (f) “oval” nanoparticle encapsulated laterally in the walls of the bamboo structure of N-MWCNTs.

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