Developing microswarms with three-dimensional structures and realizing independent control of microswarms are two significant challenges in the field of micro/nanorobot swarms. This chapter first presents a strategy to construct a tornado-like microswarm with a three-dimensional structure through the combination of light and magnetic fields. The two-dimensional vortex-like paramagnetic nanoparticle swarm driven by the rotating magnetic field generates convection under illumination due to photothermal effects. The induced convection causes the swarm pattern to contract further and gradually rise vertically, forming a tornado-like 3D pattern that can be maintained for controlling chemical reactions. This chapter then introduces an independent control strategy of microswarms based on different magnetic responses of building blocks. The variation of the aspect ratio of the ribbon-like swarm formed by nickel nanorods with the field ratio of the oscillating field is very different from that formed by Fe3O4 nanoparticles. A theoretical model based on dipole–dipole interaction is constructed and clarifies that the main reason for this difference is attributed to the magnetic anisotropy of nanorods. Thus, independent control of the swarm pattern under the same input is achieved by using the nickel nanorod swarm and the Fe3O4 nanoparticle swarm.
Three-Dimensional Structure and Independent Control of Micro/Nanorobot Swarms
Springer Train is Electrical & Electronics eng.
Magnetic Micro and Nanorobot Swarms: From Fundamentals to Applications ; Kapitel : 5 ; 127-162
2023-12-07
36 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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