ABSTRACT
The strength and flexibility of carbon nanotubes make them of potential use in controlling other structures at the nanoscale, particularly in nanobiotechnology engineering sector, as nanoelectronic devices, field emitters, gas sensors, high-strength composites and for hydrogen storage. Carbon nanotubes are composed exclusively by carbon atoms, arranged in regular and symmetric crystals and grouped into the broader class of carbon nanostructures, which includes also the fullerenes, and the onion-like. The structures formed by a single graphite rolled plane are known as single-walled carbon nanotubes or graphene tubes, while those formed by more rolling up tubes are called multi-walled carbon nanotubes. The decrease of the effective mass involves a raise of the diffusion in carbon nanotubes (CNT); the particular needs at practical and technological level will imply the choice of the CNT with the right indices. The variation of relaxation time affects the diffusion of CNTs.
