“…In recent years, attention, initially focused on nanostructures with simple geometries (planar: graphene; [3] tubular: single-, double-and multi-walled CNTs; [2] spherical/spheroidal: fullerenes, onion-like carbon, nanocages [4] ) has been extended to C sp 2 allotropic forms with complex geometries (nanorings, nanocones, nanohorns, nanodisks, Y, T and X junctions, twisted ribbons). [5] However, in spite of the great proliferation of novel and attractive nanocarbons, CNTs still play a leading role in nanotechnologies, involving the most disparate application fields, from nanoelectronics [6] to medicine. [7] Single-and multi-walled carbon nanotubes (SWCNTs and MWCNTs) are successfully synthesised by a number of methods.…”