Magnetic Micro Actuator Using Interactive Force between Magnetic Elements

Hatama, Kenji; Tsumori, Fujio; Xu, Yating; Kang, Hyun−Goo; Osada, Toshiko; Miura, Hideshi

doi:10.7567/jjap.51.06fl14

Cited by 15 publications

(13 citation statements)

References 25 publications

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“…Recently, soft robotics has been widely attracting researchers in the field of engineering. There have been many researches on soft robotics, [1][2][3][4][5][6] among them, some examples have been inspired by natural soft organisms. The natural flexible motions could be useful since living creatures have excellent functions obtained after long years of their evolutions.…”

Section: Introductionmentioning

confidence: 99%

Magnetic driven tentacles for bio-mimic motion

Murakami¹,

Tsumori²

2022

Jpn. J. Appl. Phys.

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In this paper, we introduce our developed magnetically actuated artificial tentacles. Tentacles are found in nature, for example, of cuttlefishes, octopuses, and jellyfishes. These natural tentacles have flexibility without skeletons or joints and can move in complex ways. In the present work, we propose an actuation system for the complicated motion of the tentacles and developed a method to fabricate an artificial tentacle composed of a silicone elastomer and hard magnetic particles. The present tentacles could be actuated and controlled by an applied rotating magnetic field. A 2-dimensional simulation system was also developed to predict the motion of the artificial tentacles. The simulated results showed good agreement with experimental data. Finally, an artificial tentacle was prepared to show that the tip of the structure was controlled to draw some motion. A periodic circular motion was demonstrated as an example.

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Section: Introductionmentioning

confidence: 99%

Magnetic driven tentacles for bio-mimic motion

Murakami¹,

Tsumori²

2022

Jpn. J. Appl. Phys.

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“…Considering the limited choices of feasible control apparatuses, a technique used in many studies involves incorporating magnetic particles in the fabrication process in addition to the commonly used elastomer, poly (dimethylsiloxane) (PDMS), to construct pillar arrays that are not only elastic but also magnetically responsive and thus controllable by magnetic fields. [8][9][10][11][12][19][20][21][22][23][24][25][26] This technique of utilising magnetic particles for the control of bodies is rather simple yet highly advantageous in the control of miniaturised structures.…”

Section: Introductionmentioning

confidence: 99%

“…Several methods have been used for the fabrication of magnetic composite materials, both with, [8][9][10][11][12][19][20][21][22][23][24][25][26][27] and without, 13,[28][29][30][31][32] the use of moulds. The fabrication techniques without moulds, such as 3D or 4D printing 13,[28][29][30][31] and self-organisation of magnetic particles, 32) are convenient, but there are more limitations regarding the applicable materials or the control of product size and structure.…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have been conducted based on pillar arrays having a uniform distribution of magnetic particles, [8][9][10][11][12][13][19][20][21][27][28][29][30][31][32] while there were not as many otherwise. Among the studies on pillar arrays with nonuniform particle distribution, [22][23][24][25][26]33) with the exception of our study, 25,26) none have studied and/or mentioned the characteristics of pillar arrays with magnetic tips to form distinctive patterns under the influence of magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

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Active control of surface profile by magnetic micropillar arrays

Gaysornkaew

Tsumori

2021

Jpn. J. Appl. Phys.

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Pillar arrays have been extensively used in science and engineering, with major applications at the micro or nano scale, requiring a control technique that can operate in a small, confined area. In this study, an active control method for the surface profile was developed using elastic micropillar arrays with magnetic tips. Single-, double-, and multiple-magnetic pillar arrays were fabricated from poly(dimethylsiloxane) and carbonyl iron particles using a mould prepared by laser drilling. The pillar behaviour was investigated in static and moving magnetic fields. In a static magnetic field, a single pillar is bent, double pillars are attached to a pair, and multiple pillars form pair and line patterns parallel to the magnetic field direction at a field strength of 55 mT and 85 mT, respectively, for a horizontal magnetic field. In a moving magnetic field, the propagating deformation of pillar arrays could successfully transport an 8 mm diameter plastic bead horizontally across the pillared surface at a speed of 4 mm s−1.

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“…To produce artificial cilia sensors, it is essential to develop a fabrication method that will allow precise control of the form (e.g., diameter and length) of single or multiple materials, depending on the intended use. The vertical growth of artificial cilia on a substrate has been demonstrated using one-dimensional nanowires or carbon nanotubes, , and periodic cilia have been formed on a substrate through laser ablation, roll-pulling method, inkjet printing, and photolithography and etching processes. − However, these inorganic material-based cilia structures are vulnerable to external impacts, difficult to grow to a suitable length on the millimeter scale, and limited regarding shape control and material selection. To resolve these concerns, polymer-based artificial cilia have been prepared by interfusing polydimethylsiloxane polymer-based composite solutions into molds using osmotic pressure and a magnetic field, followed by curing.…”

Section: Introductionmentioning

confidence: 99%

Self-Emitting Artificial Cilia Produced by Field Effect Spinning

Jeong

Lim

et al. 2019

ACS Appl. Mater. Interfaces

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In nature, many cells possess cilia that provide them with motor or sensory functions, allowing organisms to adapt to their environment. The development of artificial cilia with identical or similar sensory functions will enable high-performance and flexible sensing. Here, we investigate a method of producing artificial cilia composed of various polymer materials, such as polyethylene terephthalate, polyurethane, poly(methyl methacrylate), polyvinylpyrrolidone, polystyrene, polyvinyl chloride, and poly (allylamine hydrochloride), using a field effect spinning (FES) method. Unlike wet- or electro-spinning, in which single or multiple strands of fibers are pulled without direction, the FES method can grow fiber arrays vertically and uniformly on a substrate in cilia-like patterns. The lengths and diameters of the vertically grown artificial cilia can be controlled by the precursor polymer concentration in the solution, applied electric current and voltage, and shape and size of the needle tip used for FES. The red, green, and blue emission characteristics of the polymer-quantum dot-based self-emitting artificial cilia prepared in polymer–inorganic nanoparticle hybrid form were determined. In addition, an artificial cilia-based humidity sensor made of the polymer–polymer composite was fabricated.

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Magnetic Micro Actuator Using Interactive Force between Magnetic Elements

Cited by 15 publications

References 25 publications

Magnetic driven tentacles for bio-mimic motion

Magnetic driven tentacles for bio-mimic motion

Active control of surface profile by magnetic micropillar arrays

Self-Emitting Artificial Cilia Produced by Field Effect Spinning

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