ABSTRACT
Single carbon nanotubes come often as tightly bundles of single walled nanotubes entangled as curly locks. A wide variety of processes is available to produce carbon nanotubes. They can be classified, first into high temperature methods like the electric arc, laser ablation and solar beam. The material to be collected which contains a high density of carbon nanotubes is in the central part of the collaret and looks like webs. High temperature routes are known to produce high quality materials which mean higher graphitization of the nano tubes. They can be used also to produce large quantities of single walled carbon nanotubes. Single walled carbon nanotubes samples are contaminated by graphitic structures, amorphous carbon and magnetic particles used as catalyst. The molecular structures of carbon nanotube can be seen as single or multiple graphitic layers rolled to form a tubule.
