Cai Kun, Sun Sreykeo, Shi Jiao, Zhang Chao, Zhang Yingyan
School of Science, Harbin Institute of Technology, 518055 Shenzhen, China.
Phys Chem Chem Phys. 2021 Sep 14;23(34):18893-18898. doi: 10.1039/d1cp01950c. Epub 2021 Aug 23.
This study designs a carbon nanotube (CNT)-based rotary nanomotor actuated by four graphene origami (G-ori) drivers with adjustable positions. When the drivers' tips have different contact states with the CNT rotor at a finite temperature, the rotor has different rotational states due to different interaction strength between the rotor and the tips. Using the molecular dynamics simulation approach, we study the effects of the drivers' position, such as the gaps between the rotor and the drivers' tips and their layout angles. Numerical results indicate that both the stable rotational frequency (SRF) and the rotational direction change with the layout angles. In an interval from -40° to -25°, the SRF increases monotonously. There also exists an angle interval in which the G-ori drivers fail to actuate the rotor's rotation. The gap offset leads to different SRF of the same rotor. Hence, one can design a rotary nanomotor with controllable rotation, which is critical for its applications in a nanomachine.
本研究设计了一种基于碳纳米管（CNT）的旋转纳米马达，该马达由四个位置可调的石墨烯折纸（G-ori）驱动器驱动。当驱动器的尖端在有限温度下与CNT转子具有不同的接触状态时，由于转子与尖端之间的相互作用强度不同，转子具有不同的旋转状态。使用分子动力学模拟方法，我们研究了驱动器位置的影响，例如转子与驱动器尖端之间的间隙及其布局角度。数值结果表明，稳定旋转频率（SRF）和旋转方向都随布局角度而变化。在-40°至-25°的区间内，SRF单调增加。还存在一个角度区间，在此区间内G-ori驱动器无法驱动转子旋转。间隙偏移导致同一转子具有不同的SRF。因此，可以设计一种具有可控旋转的旋转纳米马达，这对其在纳米机器中的应用至关重要。
