Effect of machine shape on swimming properties of the spiral-type magnetic micro-machine

Sendoh, M.; Ajiro, N.; Ishiyama, K.; Inoue, M.; Arai, Ken Ichi; Hayase, Takeshi; Akedo, Jun

doi:10.1109/20.800632

Cited by 37 publications

(10 citation statements)

References 6 publications

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“…This has been used for the manipulation of magnetic devices in the body [1]. In addition, both DC fields with gradients [2][3][4] as well as rotating and oscillating fields [5][6][7] have been used to generate motion.…”

Section: Introductionmentioning

confidence: 99%

Flagella-like Propulsion for Microrobots Using a Nanocoil and a Rotating Electromagnetic Field

Bell

Leutenegger

Hammar

et al. 2007

Proceedings 2007 IEEE International Conference on Robotics and Automation

101

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A propulsion system similar in size and motion to the helical bacterial flagella motor is presented. The system consists of a magnetic nanocoil as a propeller (27 nm thick ribbon, 3 μm in diameter, 30-40 μm long) driven by an arrangement of macro coils. The macro coils generate a rotating field that induces rotational motion in the nanocoil. Viscous forces during rotation result in a net axial propulsion force on the nanocoil. Modeling of fluid mechanics and magnetics was used to estimate the requirements for such a system. The fabrication of the magnetic nanocoils and the system setup are explained. Experimental results from electromagnetic actuation of nanocoils as well as from their propulsion in both paraffin oil and water are presented. This is the first time a propulsion system of this size and motion-type has been fabricated and experimentally verified.

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Section: Introductionmentioning

confidence: 99%

Flagella-like Propulsion for Microrobots Using a Nanocoil and a Rotating Electromagnetic Field

Bell

Leutenegger

Hammar

et al. 2007

Proceedings 2007 IEEE International Conference on Robotics and Automation

101

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“…It is rotated by the external rotational magnetic field and changes the rotation into the driving force with the screw or the spiral blades [3], [4].…”

Section: B Spiral Magnetic Micromachinementioning

confidence: 99%

The operation of a magnetic micromachine for hyperthermia and its exothermic characteristic

et al. 2002

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“…However, these mechanisms are limited by the projection distance of the magnetic field gradients. Another propulsion mechanism was proposed by Bell et al [19] and Sendoh et al [20]. This mechanism mimics the morphology of the bacterial flagellum and capitalizes on the generation of rotating magnetic fields.…”

Section: Introductionmentioning

confidence: 98%

Wireless Magnetic-Based Closed-Loop Control of Self-Propelled Microjets

et al. 2014

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In this study, we demonstrate closed-loop motion control of self-propelled microjets under the influence of external magnetic fields. We control the orientation of the microjets using external magnetic torque, whereas the linear motion towards a reference position is accomplished by the thrust and pulling magnetic forces generated by the ejecting oxygen bubbles and field gradients, respectively. The magnetic dipole moment of the microjets is characterized using the U-turn technique, and its average is calculated to be 1.310−10 A.m2 at magnetic field and linear velocity of 2 mT and 100 µm/s, respectively. The characterized magnetic dipole moment is used in the realization of the magnetic force-current map of the microjets. This map in turn is used for the design of a closed-loop control system that does not depend on the exact dynamical model of the microjets and the accurate knowledge of the parameters of the magnetic system. The motion control characteristics in the transient- and steady-states depend on the concentration of the surrounding fluid (hydrogen peroxide solution) and the strength of the applied magnetic field. Our control system allows us to position microjets at an average velocity of 115 m/s, and within an average region-of-convergence of 365 m.

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Effect of machine shape on swimming properties of the spiral-type magnetic micro-machine

Cited by 37 publications

References 6 publications

Flagella-like Propulsion for Microrobots Using a Nanocoil and a Rotating Electromagnetic Field

Flagella-like Propulsion for Microrobots Using a Nanocoil and a Rotating Electromagnetic Field

The operation of a magnetic micromachine for hyperthermia and its exothermic characteristic

Wireless Magnetic-Based Closed-Loop Control of Self-Propelled Microjets

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