Magnetic actuation of BMRs.

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Presentation transcript:

Magnetic actuation of BMRs. Magnetic actuation of BMRs. (A) Schematics of the magnetic actuation for MSP, MCR, and MTS, wherein V represents the translational velocity, B denotes the strength of the magnetic field, f represents the input frequency of the magnetic field, ω indicates the rotation velocity of the microsphere, and θ denotes the tilt angle between the rotation axis of the microsphere and z axis. (B) Time-lapse image sequences of the controlled locomotion of MSP-72h, MCR-24h (θ = 90°), and MTS-24h, with time instants marked and motion trajectories delineated. The input magnetic field strength and frequency were 7.5 mT and 10 Hz for MSP-72h and 7.5 mT and 5 Hz for MCR-24h. For MTS-24h, the magnetic field used is shown in fig. S9. (C) Velocity-frequency profiles for three-pitch MSP-6h/24h/72h samples in water. (D) Swimming performances of three-pitch MSP-24h in diluted blood, gastric juice, and urine (all extracted from SD rats), respectively. (C) and (D) were obtained under a magnetic field strength of 7 mT in a range of rotation frequencies. The three-pitch body length for the MSP samples was obtained via sonication of the S. platensis before the dip-coating process. The error bars represent the standard deviation of three tests. Xiaohui Yan et al. Sci. Robotics 2017;2:eaaq1155 Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works