Cai Kun, Shi Jiao, Yu Jingzhou, Qin Qing H
College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, 712100, China.
Research School of Engineering, the Australian National University, Canberra, ACT 2601, Australia.
Sci Rep. 2018 Feb 22;8(1):3511. doi: 10.1038/s41598-018-21694-2.
When argon is used as a protecting gas in the fabrication or working environment of a nanodevice, absorption of some argon atoms onto the surface of the device lead to different responses. In this work, the rotation of the rotor in a carbon nanotube (CNT)-based rotary nanomotor in argon environment is investigated. In the rotary nanomotor, two outer CNTs act as the stator and are used to constrain the inner CNT (i.e., the rotor). The rotor is driven to rotate by the stator due to their collision during thermal vibration of their atoms. A stable rotational frequency (SRF) of the rotor occurs when the rotor reaches a dynamic equilibrium state. The value of the SRF decreases exponentially with an increase in the initial argon density. At dynamic equilibrium date, some of the argon atoms rotate synchronously with the rotor when they are absorbed onto either internal or external surface of the rotor. The interaction between the rest of the argon atoms and the rotor is stronger at higher densities of argon, resulting in lower values of the SRF. These principles provide insight for future experimentation and fabrication of such rotary nanomotor.
当在纳米器件的制造或工作环境中使用氩气作为保护气体时，一些氩原子吸附到器件表面会导致不同的响应。在这项工作中，研究了基于碳纳米管（CNT）的旋转纳米马达在氩气环境中转子的旋转情况。在旋转纳米马达中，两个外部碳纳米管充当定子，用于约束内部碳纳米管（即转子）。由于原子热振动期间它们之间的碰撞，定子驱动转子旋转。当转子达到动态平衡状态时，会出现转子的稳定旋转频率（SRF）。SRF的值随着初始氩气密度的增加呈指数下降。在动态平衡时，一些氩原子吸附到转子的内表面或外表面时会与转子同步旋转。在较高的氩气密度下，其余氩原子与转子之间的相互作用更强，导致SRF值更低。这些原理为未来此类旋转纳米马达的实验和制造提供了思路。
