Abstract Submitted to the ; NANOTUBE'05 Conference:

We present the latest advances in the production and state-of-the art characterization of B- and N-doped carbon nanotubes. We briefly discuss different approaches to producing these novel doped nano-systems. The use of high-resolution transmission electron microscopy (HRTEM), electron energy loss spectroscopy (EELS), scanning tunnelling spectroscopy (STS), Raman Spectroscopy and allied techniques to characterize these doped systems is reviewed. From he theoretical point of view, it will be demonstrated that low concentrations of dopants (e.g. <0.5 %) could be incorporated within tubes. In this way, the electronic conductance would change dramatically and the mechanical properties would not be altered. In addition, because of the presence of holes (B-doped tubes) or donors (N-doped tubules), their surface would become more reactive. The field emission properties and their use as gas sensors are also discussed. It is clear that these materials possess outstanding properties whe n compared to pure carbon nanotubes, and it is foreseen that these systems will revolutionize some aspects of nanotube science and technology, thus opening a vast field of experimental and theoretical research.

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