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Characteristics of bamboo defects in peapod-grown double-walled carbon nanotubes

Research output: Contribution to journalJournal article

Published

Article number195423
Journal publication date11/11/2010
JournalPhysical review b
Journal number19
Volume82
Number of pages8
Original languageEnglish

Abstract

Single-walled carbon nanotubes can function as nanoscale reaction chambers for growing smaller nanotubes within the host tube from encapsulated fullerenes by annealing. The diameter of the host outer tube restricts the diameter of the inner tube due to van der Waals interactions but not its chirality: it is possible that inner tubes with different chiralities start to grow in different places at the same time. A straight junction occurs at the connection of these two tubes which we refer to as bamboo defects. We show that localized states appear in the calculated density of states associated with these bamboo defects, some of them close to the Fermi level, and present a detailed theoretical study of ballistic transport through double-walled tubes where the inner shell contains bamboo defects. We find that the presence of bamboo defects should be possible to detect through electronic-transport measurements and the number of bamboo defects per unit length can be extracted from the structure of the resonances appearing in the transmission coefficient.

Bibliographic note

© 2010 The American Physical Society