Since the discovery of carbon nanotubes (CNT), academics and industrialists have researched or considered their use in brake discs; fuel cells; advanced aerospace composites; co-axial cable; conductive fuel lines; electromagnetic interference shielding in electronic devices; conductive tyres; conductive inks; and so on. Carbon nanotubes consist of molecular cylinders of pure, hexagonally-arranged carbon atoms that resemble rolled-up sheets of chicken wire with a diameter measured in a few nanometres and a length of many microns. The following video explains how CNT has been prepared by fusing carbon rods at high temperature.