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

Author(s): Tsetseris Leonidas | Pantelides Sokrates

Journal: Nanoscale Research Letters
ISSN 1931-7573

Volume: 6;
Issue: 1;
Start page: 245;
Date: 2011;
Original page

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.
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