The effects of various distributions of defects in (5,5) single-walled C nanotubes were considered, and a means for connecting 2 perfect semi-infinite tubes having differing chiralities was suggested; such as 4 different (5,5)/(n,0) (n = 8, 9, 10) intramolecular junctions. It was found that the conductance gap of the metal/semiconductor heterojunction was not determined by the electronic structure of the semiconductor tube alone, and that the defect distribution mainly changed the step behavior of the conductance. This was particularly obvious in the case of (5,5)/(9,0) metal/metal junctions.

Structural and Electronic Properties of Defect and Intramolecular Junctions for Single-Walled Carbon Nanotube. H.Liu, J.Chen, H.Yang: Physica Status Solidi B, 2004, 241[1], 127-33