Effect of hydrogenation and curvature of rotor on the rotation transmission of a curved nanobearing

ZL Gao and HF Cai and J Shi and LN Liu and Z Chen and Y Wang, COMPUTATIONAL MATERIALS SCIENCE, 127, 295-300 (2017).

DOI: 10.1016/j.commatsci.2016.10.037

When fixing the outer tube of a double-wall carbon nanotube (DWCNT), the rotation and/or oscillation of the inner tube (rotor) can be actuated by a co-axial-layout nanotube-based motor. Both the motor and DWCNT-based bearing form a nanodevice called motion transmission system (MTS). Generally, the rotor and motor have differently dynamic responses. To obtain stable output signals from an MTS, we study the dynamic response of a curved rotor with hydrogenated ends. Both stability and efficiency of motion transmission depend on the interaction between the adjacent ends of motor and rotor. By analyzing the motion transmission state of rotor with some typical carbon-hydrogen (C-H) bonding layout schemes, we find that a stable output rotation of the curved rotor can be obtained if either the rotor or motor has C-H bonds at the adjacent end. If both the rotor and motor have the same C-H bonding layout at the adjacent ends, the output motion of rotor is very sensitive to both the input rotation and C-H bonding layout, which means that the dynamic response of the curved rotor becomes uncontrollable. The above phenomena are very different from those as observed for a straight rotor in the same system. (C) 2016 Elsevier B.V. All rights reserved.

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