The Research On Fabrication,Movement Regulation And Application Of Light-driven Micro/nanomotor

Light-driven micro/nanomotors(MNM)is the frontier research of the nanoscience and technology,and its self-driven behavior in liquid environment is of great significance in the research of active matter and biomedicine.On the one hand,through the structural design and movement regulate of MNM,new active matter system can be constructed to simulate biological behaviors and macroscopic physical phenomena in nature.On the other hand,light-driven MNM that can be remotely controlled has potential applications in precision medicine,environmental purification,sensing and other fields due to its advantages of small size and controllable motion.However,there are still great challenges in the movement regulation of light-driven MNM,which hinders its practical application.Therefore,in the face of the above problems,this paper focuses on the movement regulate of light-driven MNM,and on this basis,explores its potential applications including the following two parts:1.Regulation of multiple modes of movement of UV light-driven ZnO/Au micro/nanomotor.We report a rod-shaped ZnO/Au motor with multiple modes of motion under the regulate of UV light.By adjusting the UV-light intensity and irradiation angle,the rod-shaped ZnO/Au motor exhibits different modes of motion,i.e.,rotation around one end of the rod motor,rotation around the center of mass,and translational motion.The different motion modes can be flexibly switched,which is contribute to the combined of self-electrophoresis and self-thermophoresis mechansims.We believe that such micro/nanomotor with controllable motion mode will provide new ideas for exploring rich active matter systems and the development of intelligent soft robots.2.Research on collective behavior regulation of visible light-driven BiVO4 micro/nanomotor and its applications in environmental purification.We develop a visible-light-powered BiVO4 and GO/BiVO4 micro/nanomotors.Under visible light irradiation,BiVO4 and GO/BiVO4 motors exhibit self-propulsion and dynamic collective behavior based on the combined self-diffusiophoresis and electroosmotic flow mechanism.In response to the regulation of light intensity,the micromotors can vividly mimic the "predator-bait" behavior.Finally,based on the excellent photocatalytic activity of the BiVO4-based micromotor,we have studied its performance in the degradation of organic pollutants and found that the dynamic collective behavior of the micromotor could accelerate the chemical reaction rate in the solution,and realizes the efficient degradation of the organic pollutant RhB.We expect this micro/nanomotors with controllable collective behavior in this work has great application potential in the fields of active matter,bionics,and environmental remediation.