Advanced Materials Science Research

Carbon Nanotubes W

Carbon nanotubes (CNTs) ar tubes made from carbon with diameters generally measured in nanometers. Carbon nanotubes typically talk to single-wall carbon nanotubes (SWCNTs) with diameters within the vary of a metric linear unit. They were discovered severally by Iijima and Ichihashiand educator et alin arc lamp chambers kind of like those wont to manufacture fullerenes. Single-wall carbon nanotubes ar one in all the allotropes of carbon, intermediate between atomic number 6 cages and flat graphene. Although not created this manner, single-wall carbon nanotubes are often thought of as cutouts from a two-dimensional polygonal shape lattice of carbon atoms rolled up on one in all the lattice vectors of the polygonal shape lattice to make a hollow cylinder. during this construction, periodic boundary conditions ar obligatory over the length of this roll up vector to yield a lattice with volute symmetry of seamlessly guaranteed carbon atoms on the cylinder surface Carbon nanotubes conjointly typically talk to multi-wall carbon nanotubes (MWCNTs) consisting of nested single-wall carbon nanotubesIf not identical, these tubes ar terribly kind of like Oberlin, Endo and Koyama's long straight and parallel carbon layers cylindrically rolled around a hollow tube Multi-wall carbon nanotubes also are generally wont to talk to double- and triple-wall carbon nanotubes. Carbon nanotubes also can talk to tubes with associate undetermined carbon-wall structure and diameters but a hundred nanometers. Such tubes were discovered by Radushkevich and LukyanovichWhile nanotubes of alternative compositions exist, most analysis has been targeted on the carbon ones. Therefore, the "carbon" qualifier is usually left implicit the acronyms, and also the names ar abbreviated NT, SWNT, and MWNT. Carbon nanotubes will exhibit exceptional electrical conductivity They even have exceptional tensile strengthand thermal conductivity because of their nanostructure and strength of the bonds between carbon atoms. additionally, they'll be with chemicals changed. These properties ar expected to be valuable in several areas of technology, like natural philosophy, optics, composite materials (replacing or complementing carbon fibres), engineering science, and alternative applications of materials science.    

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