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Showing posts from July, 2022

Nano Chemistry

A carbon nanotube (CNT) is a tube made of carbon with diameters typically measured in nanometres. A scanning tunneling microscopy image of a single-walled carbon nanotube Rotating single-walled zigzag carbon nanotube Single-wall carbon nanotubes (SWCNTs) Single-wall carbon nanotubes are one of the allotropes of carbon, intermediate between fullerene cages and flat graphene, with diameters in the range of a nanometre. Although not made this way, single-wall carbon nanotubes can be idealized as cutouts from a two-dimensional hexagonal lattice of carbon atoms rolled up along one of the Bravais lattice vectors of the hexagonal lattice to form a hollow cylinder. In this construction, periodic boundary conditions are imposed over the length of this roll-up vector to yield a helical lattice of seamlessly bonded carbon atoms on the cylinder surface.[1] Multi-wall carbon nanotubes (MWCNTs) consisting of nested single-wall carbon nanotubes[1] weakly bound together by van der Waals interactio...