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Nanoscale Res Lett. 2011 Mar 22;6(1):245. doi: 10.1186/1556-276X-6-245.

Defect-related hysteresis in nanotube-based nano-electromechanical systems.

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  • 1Department of Physics, National Technical University of Athens, GR-15780 Athens, Greece. leont@mail.ntua.gr.

Abstract

The electronic properties of multi-walled carbon nanotubes (MWCNTs) depend on the positions of their walls with respect to neighboring shells. This fact can enable several applications of MWCNTs as nano-electromechanical systems (NEMS). In this article, we report the findings of a first-principles study on the stability and dynamics of point defects in double-walled carbon nanotubes (DWCNTs) and their role in the response of the host systems under inter-tube displacement. Key defect-related effects, namely, sudden energy changes and hysteresis, are identified, and their relevance to a host of MWCNT-based NEMS is highlighted. The results also demonstrate the dependence of these effects on defect clustering and chirality of DWCNT shells.

PMID:
21711767
[PubMed]
PMCID:
PMC3211306
Free PMC Article
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