Study On The Dynamics Of Oscillating Micromotors In Complex Environments

Micromotors are a type of stimuli-response micro-actuator that converts energy from the environment into kinetic energy through means like chemical reactions.Its advantages include easy preparation and diverse driving modes,making it a promising research topic in both fundamental and applied research.Recently,a new type of micromotors has been drawing researchers'attention,which oscillates under UV light in KCl and H₂O₂ solution.This oscillating motor is important in fundamental and applied studies such as non-linear physics and periodic drug releasing.Based on the previous research conducted in our lab,this thesis focuses on how the dynamics of an oscillating motor is modulated in a complex environment,in an attempt to elucidate the mechanism that benefits further applications.We first studied the interaction between oscillators and discovered that they moved faster and with shorter periods at both an individual and collective level.Two mechanisms were proposed and corresponding control experiments and numerical simulations were carried out.In addition,self-electrophoretic motors were mixed with the oscillators and placed in the same environment.The self-electrophoretic motors changed from linear motion to oscillation,and were controlled by the chemical waves generated by the oscillators.It was then verified that the silver ions which were deposited on the bimetallic rods played a vital role in the“teaching”process.An ethylene glycol aqueous solution was used to study how the dynamics of oscillating motors changed in different viscosities.Experiments show that the peak speed of the individual and collective motion both decreased as the viscosity increased.We also studied how collective behaviors changed on substrates with different surface modification.The obtained data verified the influence of the substrate zeta potential on the collective behaviors of oscillating motors.By completing this project,we have gained an initial understanding of the dynamics of oscillating motors in a complex environment,laying a foundation for their practical applications in similar environments.