Improved electron transport along a carbon nanotube (CNT) fiber when it is spun from an array of longer nanotubes is reported. The effect of chemical post‐treatments is also demonstrated. For example, the covalent bonding of gold nanoparticles to the CNT fibers remarkably improves conductivity (see figure), whereas annealing CNT fibers in a hydrogen‐containing atmosphere leads to a dramatic decrease in conductivity.

No abstract

No abstract

A supramolecular assembly comprising C60 molecules inside single-wall carbon nanotubes (SWNTs)–C60@SWNT was synthesized in abundance by a vapor phase method, whereby vaporized C60 molecules permeate the interiors of the nanotube and self-assemble into van der Waals interacting chains. Yields were studied as a function of the various synthesis parameters using a calibrated weight uptake technique. For isochronal experiments, the most important parameters effecting yield under the tested conditions were SWNT purity and annealing temperature. Yields of ∼90% have been achieved and confirmed with direct observation by transmission electron microscopy. Agreement between simulated and empirical selected-area diffraction patterns indicates that the endohedral, one-dimensional C60 lattice is simple, with a lattice parameter of 1.00 nm.