Carbon nanotubes

The diameter of a carbon nanotube CNT, which is a tube formed of carbon, is commonly measured in nanometers. One of the types of carbon, single-wall carbon nanotubes SWCNTs are an intermediate form of flat graphene and fullerene cages with sizes in the nanometer range. Single-wall carbon nanotubes can be envisioned as cuttings from a two-dimensional hexagonal lattice of carbon atoms that are rolled up along one of the Bravais lattice vectors of the hexagonal lattice to form a hollow cylinder, despite not being created in this fashion. In this technique, a helical lattice of flawlessly connected carbon atoms is produced on the cylinder surface by imposing periodic boundary requirements across the length of this roll-up vector. single-wall carbon nanotubes nested together and weakly joined by van der Waals forces to form multi-wall carbon nanotubes MWCNTs consists of tree-ring-like structures made of nested single-wall carbon nanotubes that are only loosely connected by van der Waals forces. These tubes are extremely similar, if not identical, to the long straight and parallel carbon layers cylindrically stacked around a hollow tube proposed by Oberlin, Endo, and Koyama. Double- and triple-wall carbon nanotubes are also sometimes referred to as multi-wall carbon nanotubes. Tubes having an unknown carbon wall structure and sizes under 100 nanometers are also referred to as carbon nanotubes. In 1952, Radushkevich and Lukyanovich made this discovery. Although it is frequently not published, the carbon nanotube created by normal manufacturing techniques is generally substantially bigger than its diameter. As a result, end effects are frequently disregarded and the length of carbon nanotubes is thought to be unlimited. Some carbon nanotubes are semiconductors, while others can display astounding electrical conductivity. The strength of the bonds between the carbon atoms in their nanostructure and their extraordinary tensile strength and thermal conductivity give them these qualities as well. Additionally, they are subject to chemical modification. Numerous technological fields, including electronics, optics, composite materials replacing or enhancing carbon fibres, nanotechnology, and other uses of materials science, are anticipated to benefit from these features.