Abstract We have undertaken low-temperature conduction measurements on arc-discharge synthesized, semiconducting multiwalled carbon nanotubes (MWNT). The diameters of these are in the range 2.5–10 nm, corresponding to sizes just above single-walled (SWNT), up middle-sized MWNTs. energy gap, inversely related diameter, varies strongly this range, and consequently there is a strong dependence tra...

Elliptically polarized light-scattering measurements were performed to investigate the dispersion behavior of multiwalled carbon nanotubes (MWNT). Xylene- and pyridine-derived MWNT powders were dispersed in water and ethanol in separate optic cells and allowed to sit undisturbed over a two-week time period after probe sonication. Continuous light-scattering measurements taken between scattering...

Self-assembly of carbon nanotubes Introduction This talk addresses the self-assembly of carbon nanotubes (CNTs). In order for useful and potentially important structures and devices to be built from CNTs it is essential that the nanotubes be manipulated and organized in some way. One of the most promising routes to such structures and devices appears thus far to be self-assembly. While acknowle...

Aniline is oxidized to nitrosobenzene as the initial product, which undergoes further oxidation to nitrobenzene. The nitrosobenzene formation is catalyzed by functionalized multiwalled carbon nanotubes (CNT) followed by a coupling reaction between nitrosobenzene and aniline to produce azobenzene. This coupling requires close proximity of the reactants. It proceeds rapidly resulting in the UV-VI...