Conduction properties of semiconductive multiwalled carbon nanotubes

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 transport tube diameter. Certain characteristics much alike those found SWNTs, such as ON-state resistance Coulomb blockade. However, gap has more complex behavior than one number features, negative differential commonly observed. Different models for small bias briefly discussed, we consider especially possibility via second layer. Graphical abstract