CHARGE OF CARBON NANOTUBES FULL
These discoveries triggered research that succeeded in greatly increasing the efficiency of the catalytic production technique, and led to an explosion of work to characterize and find applications for SWCNTs.Īrmchair nanotube, configuration (4, 4) Basic details A "sliced and unrolled" representation of a carbon nanotube as a strip of a graphene molecule, overlaid on diagram of the full molecule (faint background). at IBM independently discovered in 1993 that co-vaporizing carbon and transition metals such as iron and cobalt could specifically catalyze SWCNT formation. Iijima and Ichihashi at NEC and Bethune et al. These properties are expected to be valuable in many areas of technology, such as electronics, optics, composite materials (replacing or complementing carbon fibers), nanotechnology, and other applications of materials science.Ī path to synthesizing carbon nanotubes was lacking until the 1990s. In addition, they can be chemically modified. Some carbon nanotube structures exhibit high electrical conductivity while others are semiconductors. Multi-wall carbon nanotubes are also sometimes used to refer to double- and triple-walled carbon nanotubes.Ĭarbon nanotubes can exhibit remarkable properties, such as exceptional tensile strength and thermal conductivity because of their nanostructure and strength of the bonds between carbon atoms. Multi-walled carbon nanotubes ( MWCNTs) consist of nested single-wall carbon nanotubes in a nested, tube-in-tube structure. They can be idealized as cutouts from a two-dimensional graphene sheet rolled up to form a hollow cylinder. Single-walled carbon nanotubes ( SWCNTs) have diameters around 0.5–2.0 nanometers, about 100,000 times smaller than the width of a human hair. They are one of the allotropes of carbon. A carbon nanotube ( CNT) is a tube made of carbon with a diameter in the nanometer range ( nanoscale).
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