Mofidi Seyedeh Mahsa, Nejat Pishkenari Hossein, Ejtehadi Mohammad Reza, Akimov Alexey V
Institute for Nanoscience and Nanotechnology (INST), Sharif University of Technology, 14588-89694, Tehran, Iran.
Mechanical Engineering Department, Sharif University of Technology, 11155-9567, Tehran, Iran.
Sci Rep. 2021 Jan 28;11(1):2576. doi: 10.1038/s41598-021-82280-7.
We provide a comprehensive computational characterization of surface motion of two types of nanomachines with four C "wheels": a flexible chassis Nanocar and a rigid chassis Nanotruck. We study the nanocars' lateral and rotational diffusion as well as the wheels' rolling motion on two kinds of graphene substrates-flexible single-layer graphene which may form surface ripples and an ideally flat graphene monolayer. We find that the graphene surface ripples facilitate the translational diffusion of Nanocar and Nanotruck, but have little effect on their surface rotation or the rolling of their wheels. The latter two types of motion are strongly affected by the structure of the nanomachines instead. Surface diffusion of both nanomachines occurs preferentially via a sliding mechanism whereas the rolling of the "wheels" contributes little. The axial rotation of all "wheels" is uncorrelated.
我们对两种带有四个碳“轮”的纳米机器的表面运动进行了全面的计算表征：一种是柔性底盘的纳米车，另一种是刚性底盘的纳米卡车。我们研究了纳米车在两种石墨烯基底上的横向和旋转扩散以及轮子的滚动运动，这两种基底分别是可能形成表面波纹的柔性单层石墨烯和理想平整的石墨烯单层。我们发现，石墨烯表面波纹促进了纳米车和纳米卡车的平移扩散，但对它们的表面旋转或轮子的滚动影响很小。后两种运动类型反而受到纳米机器结构的强烈影响。两种纳米机器的表面扩散优先通过滑动机制发生，而“轮子”的滚动贡献很小。所有“轮子”的轴向旋转都是不相关的。
