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Robotics and Biomimetics
Figure 2 | Robotics and Biomimetics

Figure 2

From: Tubular micromotors: from microjets to spermbots

Figure 2

Control mechanisms for direction and speed of motion of microjets. (A) Directional control through alignment of microjets with external magnetic fields [9] (I) and closed-loop control of microjets in 3D by setup of eight electromagnetic coils [25] (II). (B) Speed control of microjets by changing light intensity [26] (I) or temperature [27],[34] (II). A magnetic field can be used to attract and accelerate or repel and reverse the motion of magnetized microjets (III) [20].

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