Study On Self-assembly Of Dimer Nanomotors In A Confined Environment

Highly efficient biomotors exist in biological systems in nature.They play an important role in cellular activities.After millions of years of evolution,they can perfectly match the functions of living organisms to complete their life activities.Inspired by these ingenious biomotors,the design of artificial nanomotors has become an emerging research area in recent years.Thanks to the rapid development of nanotechnology,scientists have designed micro-nano motors with complex structures and diversified functions and can achieve remote and precise control,which are applied to various aspects such as medical treatment,life,and the environment.In this paper,a mesoscopic numerical simulation method(molecular dynamics and reaction multi-particle collision dynamics method)is used to study the self-assembly of a self-driven dimer motor exhibited in such an environment by constructing a confined environment with different shapes of chemical patterns The kinetic behavior explores the mechanism of microstructure formation.The first chapter of the paper introduces the research and development status of micro-nano motors,especially the current motor drive forms,application prospects,and the research background of this paper.In the second chapter,we established a dimer nanomotor motion model and a multiparticle collision dynamics model of solution particles and motors,and expounded the molecular dynamics methods and basic methods of multiparticle collision dynamics needed to study the model.And periodic boundary conditions that enable a large number of molecular simulations.In Chapter 3,we first studied the motion behavior of a single dimer micro-nano motor in a lane-like restricted activation environment;then,by changing the shape of the restricted activation three-dimensional pattern,we obtained the dimer micro-nano motor Cluster assembly phenomenon.In order to further study the relationship between the number of micro-nano motors and the shape of chemically active spot patterns and the phenomenon of self-assembly of motor clusters,we increased the number of dimer micro-nano motors to increase their volume proportion in the chemically active spot pattern.Through the analysis of radial distribution function,local direction order function,and motor motion mechanism we find that in the same environment with limited chemical activity pattern,crowding will affect the self-assembly behavior of the motor,and different shapes of chemical activity pattern will also affect micro and nano Self-assembly behavior of the motor.We performed a detailed analysis of the collective microstructures generated by self-assembly.The research in this article helps to understand the dynamic behavior and self-assembly structure of micro-nano motors under constrained conditions,and promotes the realization of various micro-nano devices.