Nanotube is a nanometer-scale tube like structure that is available in different types such as carbon nanotubes, silicon nanotubes, inorganic nanotubes, boron nitride nanotubes, membrane nanotubes and DNA nanotubes. Nanotubes are sometimes also referred to as buckytubes.
Nanotubes may look like powder or black soot, but they are the rolled-up sheets usually manufactured using graphene. Nanotubes generally form hollow strands that are only one atom thick. Nanotubes were developed from fullerene which is a structure that is similar to that of geodesic domes. Nanotubes which are produced in the laboratories are generally strong and exhibits electrical and thermal properties. Nanotubes can be generally differentiated by the number concentric cylinders, cylindrical length and cylindrical radius. Few nanotubes also exhibit various properties such as chirality which is a general expression of twisting longitudinally. Multiple nanotubes can also be assembled into microscopic mechanical systems called as nanomachines.
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