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Title: A nano universal joint made from curved double-walled carbon nanotubes

Abstract

A nano universal joint is constructed from curved double-wall carbon nanotubes with a short outer tube as stator and a long inner tube as a rotor. When one end of the rotor is driven (by a rotary motor) to rotate, the same rotational speed but with different rotational direction will be induced at the other end of the rotor. This mechanism makes the joint useful for designing a flexible nanodevice with an adjustable output rotational signal. The motion transmission effect of the universal joint is analyzed using a molecular dynamics simulation approach. In particular, the effects of three factors are investigated. The first factor is the curvature of the stator, which produces a different rotational direction of the rotor at the output end. The second is the bonding conditions of carbon atoms on the adjacent tube ends of the motor and the rotor, sp{sup 1} or sp{sup 2} atoms, which create different attraction between the motor and the rotor. The third is the rotational speed of the motor, which can be considered as the input signal of the universal joint. It is noted that the rotor's rotational speed is usually the same as that of the motor when the carbonmore » atoms on the adjacent ends of the motor and the rotor are sp{sup 1} carbon atoms. When they become the new sp{sup 2} atoms, the rotor experiences a jump in rotational speed from a lower value to that of the motor. The mechanism of drops in potential of the motor is revealed. If the carbon atoms on the adjacent ends are sp{sup 2} atoms, the rotor rotates more slowly than the motor, whereas the rotational speed is stable when driven by a higher speed motor.« less

Authors:
; ;  [1];  [2]
  1. College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100 (China)
  2. Research School of Engineering, the Australian National University, Acton, Australian Capital Territory 2601 (Australia)
Publication Date:
OSTI Identifier:
22483067
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 106; Journal Issue: 24; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOMS; CARBON NANOTUBES; DESIGN; DIAGRAMS; MOLECULAR DYNAMICS METHOD; MOTORS; ROTORS; SIGNALS; STATORS; VELOCITY

Citation Formats

Cai, Kun, Cai, Haifang, Shi, Jiao, and Qin, Qing H., E-mail: Qinghua.qin@anu.edu.au. A nano universal joint made from curved double-walled carbon nanotubes. United States: N. p., 2015. Web. doi:10.1063/1.4922916.
Cai, Kun, Cai, Haifang, Shi, Jiao, & Qin, Qing H., E-mail: Qinghua.qin@anu.edu.au. A nano universal joint made from curved double-walled carbon nanotubes. United States. doi:10.1063/1.4922916.
Cai, Kun, Cai, Haifang, Shi, Jiao, and Qin, Qing H., E-mail: Qinghua.qin@anu.edu.au. Mon . "A nano universal joint made from curved double-walled carbon nanotubes". United States. doi:10.1063/1.4922916.
@article{osti_22483067,
title = {A nano universal joint made from curved double-walled carbon nanotubes},
author = {Cai, Kun and Cai, Haifang and Shi, Jiao and Qin, Qing H., E-mail: Qinghua.qin@anu.edu.au},
abstractNote = {A nano universal joint is constructed from curved double-wall carbon nanotubes with a short outer tube as stator and a long inner tube as a rotor. When one end of the rotor is driven (by a rotary motor) to rotate, the same rotational speed but with different rotational direction will be induced at the other end of the rotor. This mechanism makes the joint useful for designing a flexible nanodevice with an adjustable output rotational signal. The motion transmission effect of the universal joint is analyzed using a molecular dynamics simulation approach. In particular, the effects of three factors are investigated. The first factor is the curvature of the stator, which produces a different rotational direction of the rotor at the output end. The second is the bonding conditions of carbon atoms on the adjacent tube ends of the motor and the rotor, sp{sup 1} or sp{sup 2} atoms, which create different attraction between the motor and the rotor. The third is the rotational speed of the motor, which can be considered as the input signal of the universal joint. It is noted that the rotor's rotational speed is usually the same as that of the motor when the carbon atoms on the adjacent ends of the motor and the rotor are sp{sup 1} carbon atoms. When they become the new sp{sup 2} atoms, the rotor experiences a jump in rotational speed from a lower value to that of the motor. The mechanism of drops in potential of the motor is revealed. If the carbon atoms on the adjacent ends are sp{sup 2} atoms, the rotor rotates more slowly than the motor, whereas the rotational speed is stable when driven by a higher speed motor.},
doi = {10.1063/1.4922916},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 24,
volume = 106,
place = {United States},
year = {2015},
month = {6}
}