Cai Kun, Wan Jing, Qin Qing H, Shi Jiao
College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, People's Republic of China. Research School of Engineering, The Australian National University, Acton, ACT 2601, Australia.
Nanotechnology. 2016 Feb 5;27(5):055706. doi: 10.1088/0957-4484/27/5/055706. Epub 2016 Jan 12.
Since a double-walled carbon nanotube (DWCNT)-based rotary motor driven by a uniform temperature field was proposed in 2014, how to control quantitatively the rotation of the rotor is still an open question. In this work, we present a mathematical relationship between the rotor's speed and interaction energy. Essentially, the increment of interaction energy between the rotor and the stator(s) determines the rotor's rotational speed, whereas the type of radial deviation of an end carbon atom on the stator determines the rotational direction. The rotational speed of the rotor can be specified by adjusting temperature and radial deviation of an end carbon atom on the stator. It is promising for designing a controllable temperature-driven rotary motor based on DWCNTs with length of few nanometers only.
自2014年提出基于双壁碳纳米管（DWCNT）的由均匀温度场驱动的旋转电机以来，如何定量控制转子的旋转仍然是一个悬而未决的问题。在这项工作中，我们给出了转子速度与相互作用能之间的数学关系。本质上，转子与定子之间相互作用能的增量决定了转子的转速，而定子上末端碳原子的径向偏差类型决定了旋转方向。通过调节温度和定子上末端碳原子的径向偏差，可以确定转子的转速。这对于设计仅基于几纳米长的DWCNT的可控温度驱动旋转电机很有前景。
