Abstract

A chemical doping has offered a rich potential for tuning the electrical properties of carbon nanotubes (CNTs). Despite extensive research on nitrogen-doped carbon nanotubes (N-CNTs), the precise control of the C-N doping nature (e.g., graphitic-N, pyridinic-N, and pyrrolic-N) is still challenging. Moreover, a fabrication mechanism of N-doped single-wall CNTs (N-SWCNTs) is not to be understood and literatures reported so far have mostly devoted to the research on multi-wall CNTs. Here we report (1) the synthesis of N-SWCNTs with a highly-enriched graphitic-N, by varying the synthesis condition of a floating-catalyst chemical vapor deposition (FC-CVD) technique and (2) electrical transport properties of N-SWCNTs fibers.

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