Right from the initial report of the existence of carbon nanotubes by Iijima, studies have been performed to understand their properties. Carbon nanotubes are tube-shaped nanostructures of carbon with electrical, mechanical, and thermal properties that derive from the special features of carbon bonds, their quasi-one-dimensional nature, and their cylindrical symmetry. These properties include very high elastic modulus, tensile strength, thermal conductivity, and electrical conductivity.
Because of their unique properties, carbon nanotubes have been considered as potential candidates for a variety of electrical, mechanical, and chemical applications. However, in order to use them commercially, many issues need to be resolved. One of the major issues is the controlling of the chirality of carbon nanotubes during its synthesis. Chirality is a special property of nanotube which describes how much it is twisted, and is deﬁned by two integer numbers n and m, which are called chiral indices. Most of the important electrical, mechanical and chemical properties of carbon nano-tubes are dependant on the chirality of the nanotube.