Abstract
Here we propose a novel micro-magnetic actuator based on magnetotactic bacteria (MTB). MTB are known for their response to an external magnetic field. A chain of magnetic nanoparticles embedded in MTB acts as a compass to orient MTB according to the magnetic field lines. To develop the rotational actuator using MTB based on magnetic principles that performs rotation of the magnetic rotor, we considered the motion control of MTB by dielectrophoresis (DEP). In this paper, the motion control of MTB was demonstrated by DEP and pearl-chain formation that MTB attract each other along electric field line was confirmed. And applying an external magnetic field to chains of MTB, we observed the rotation of the chains. Therefore we apply the micro-magnetic actuator using MTB that transports microstructures by torque of chains as a microstirring, micropumping and microvalve.
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