Abstract
Understanding the motion mechanism of biomedical micro- and nanorobots makes it possible to design micro- and nanorobots with specific motion functions according to medical needs and control and utilize their motion behavior to perform more complex tasks. This chapter elaborates on the motion mechanisms of three types of biomedical micro- and nanorobots (biological, physical field-driven, and chemical reaction-driven types), focusing on the driving mechanisms that may be applied in the in vivo environment. Biological biomedical micro- and nanobots are mainly constructed based on natural cells with motion ability, so their main movement depends on the motion mechanism of natural cells in special environments. The chapter discusses the motion mechanisms of several representative natural cells, such as bacteria, sperm cells, and immune cells. Trend behavior refers to the object's ability to sense changes in the surrounding environment and move to or away from a specific position accordingly.
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