High-speed nano-bearings constructed from double-walled carbon nanotubes : effect of flexile deformation
Double-walled carbon nanotubes (DWCNTs) have been proposed to be the leading candidates for high-speed nanobearings owing to superlubric characteristics between adjacent nanotubes. Performance of the DWCNT bearings is closely related to intertube friction, which is influenced by many factors, and in...
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sg-ntu-dr.10356-965462023-07-14T15:54:19Z High-speed nano-bearings constructed from double-walled carbon nanotubes : effect of flexile deformation Zhu, Chunzhang Zhao, Yang School of Materials Science & Engineering DRNTU::Science::Physics Double-walled carbon nanotubes (DWCNTs) have been proposed to be the leading candidates for high-speed nanobearings owing to superlubric characteristics between adjacent nanotubes. Performance of the DWCNT bearings is closely related to intertube friction, which is influenced by many factors, and in this work, we focus on the issue of flexibility of the nanotubes. Using molecular dynamics simulation, it has been found that considerable deformation of the nanotubes can emerge in the (5, 5)/(18, 0) DWCNT bearing with a length of ∼80 Å if the angular speed of the shaft reaches 1.3 rev/ps. Such flexile deformation results in two distinct states with differing frictional characteristics. One of the two states, the slippery rotation, represents an interim period characterized by in-phase distortions of the inner and outer tubes, while the other state, the resistant rotation, is a steady state with the inner-tube curving lags behind that of the outer tube. Such a lag leads to a considerable increase of circular deflection of the outer tube and a sharp decrease of the minimal distance between tubes, therefore preventing the inner tube from slippery rotation. Published version 2014-01-03T04:48:07Z 2019-12-06T19:32:17Z 2014-01-03T04:48:07Z 2019-12-06T19:32:17Z 2013 2013 Journal Article Zhu, C., & Zhao, Y. (2013). High-speed nano-bearings constructed from double-walled carbon nanotubes : effect of flexile deformation. Journal of applied physics, 114(17), 174501-. 0021-8979 https://hdl.handle.net/10356/96546 http://hdl.handle.net/10220/18390 10.1063/1.4828871 en Journal of applied physics © 2013 AIP Publishing LLC. This paper was published in Journal of Applied Physics and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4828871]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
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DRNTU::Science::Physics Zhu, Chunzhang Zhao, Yang High-speed nano-bearings constructed from double-walled carbon nanotubes : effect of flexile deformation |
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Double-walled carbon nanotubes (DWCNTs) have been proposed to be the leading candidates for high-speed nanobearings owing to superlubric characteristics between adjacent nanotubes. Performance of the DWCNT bearings is closely related to intertube friction, which is influenced by many factors, and in this work, we focus on the issue of flexibility of the nanotubes. Using molecular dynamics simulation, it has been found that considerable deformation of the nanotubes can emerge in the (5, 5)/(18, 0) DWCNT bearing with a length of ∼80 Å if the angular speed of the shaft reaches 1.3 rev/ps. Such flexile deformation results in two distinct states with differing frictional characteristics. One of the two states, the slippery rotation, represents an interim period characterized by in-phase distortions of the inner and outer tubes, while the other state, the resistant rotation, is a steady state with the inner-tube curving lags behind that of the outer tube. Such a lag leads to a considerable increase of circular deflection of the outer tube and a sharp decrease of the minimal distance between tubes, therefore preventing the inner tube from slippery rotation. |
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School of Materials Science & Engineering |
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School of Materials Science & Engineering Zhu, Chunzhang Zhao, Yang |
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Article |
author |
Zhu, Chunzhang Zhao, Yang |
author_sort |
Zhu, Chunzhang |
title |
High-speed nano-bearings constructed from double-walled carbon nanotubes : effect of flexile deformation |
title_short |
High-speed nano-bearings constructed from double-walled carbon nanotubes : effect of flexile deformation |
title_full |
High-speed nano-bearings constructed from double-walled carbon nanotubes : effect of flexile deformation |
title_fullStr |
High-speed nano-bearings constructed from double-walled carbon nanotubes : effect of flexile deformation |
title_full_unstemmed |
High-speed nano-bearings constructed from double-walled carbon nanotubes : effect of flexile deformation |
title_sort |
high-speed nano-bearings constructed from double-walled carbon nanotubes : effect of flexile deformation |
publishDate |
2014 |
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https://hdl.handle.net/10356/96546 http://hdl.handle.net/10220/18390 |
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1772828016024485888 |