Modelling and simulation of dynamic modes in manipulation of nanorods

The use of atomic force microscopy (AFM)-based robots for moving cylindrical particles has become the focus of attention in recent research works. The impossibility of observing the moving process during motion has highlighted the role of computer simulation in the investigation of nanoparticles´ movement. The motion modes (sliding, rolling, spinning) are used to investigate the mode by which a particle moves on a substrate. By using the presented model it is possible to simulate the conditions under which each of these modes are created. To validate the results, it has been observed that by gradual reduction of the nanorod´s length, the obtained results are more similar to the results of the spherical case. Furthermore, the presented modes have been evaluated by comparing with the experimental findings, which shows adequate compatibility and acceptable accuracy. In this Letter, first, the movement of particles is modelled and then the effective parameters of the process are simulated. Afterwards, the simulation of dynamic modes is carried out and, finally, verification of the results is presented. By using the presented simulations, it would be possible to predict the mode of movement during the manipulation of nanorods by means of AFM nanorobots.