Trajectory shift of magnetic microchains in an oscillating field

Li, Yan Hom; Lin, Hsiao‐Yi; Chen, Ching‐Yao

doi:10.1007/s10404-012-1094-4

Cited by 14 publications

(9 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The experimental procedure in this work is mostly the same with what has been addressed in Li et al [7]- [9]. Micro-sized magnetic particles are initially dispersed in distilled water.…”

Section: Methodsmentioning

confidence: 99%

“…Nevertheless, when the lagging phase angle reduces to , the magnetic torque change sign again, and the chain resumes to its original oscillating trajectory. For detailed descriptions regarding such as "trajectory shift", please refer to Li et al [9]. Even though the sizes of particles consisted in the present swimmer are not uniform, the fundamental physics acting on the swimmer (or a chain consisted with particles of various sizes) is identical.…”

Section: A Steers Of Micro-swimmersmentioning

confidence: 99%

“…Research on the dynamics and aggregation processes of magnetorheological fluids subjected to dynamical magnetic fields have been studied intensively, such as in a rotational field [1]- [5] and oscillating field [6]- [9]. These early literatures reveal that the micro-chains under a dynamical magnetic field may behave from rigid body motion, bending distortions and rupture failures.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, we propose an innovative and much simpler methodology to effectively manipulate the orientation of the micro-swimmers. The methodology applies a newly identified phenomenon, referred to as "trajectory shift" [9], in which the chain aligns perpendicularly to the external field when the phase angle lag (defined as the value of phase angle of the dynamical field ahead of the oscillating chain) exceeds . Detailed swimming mechanism and trajectories of steered swimmers are presented to demonstrate the applicability of such technology.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Steering of Magnetic Micro-Swimmers

Lin

Chen

2013

IEEE Trans. Magn.

Self Cite

View full text Add to dashboard Cite

We experimentally investigate the motion of micro-swimmers consisting of several magnetic particles with different sizes. Swimmers are firstly formed by a static unidirectional field, and then manipulated by an additional dynamical perpendicular field. It is known that such magnetic-particle swimmers (or chains) driven by an external field would oscillate with the orientation of the field but lagging behind by a certain phase angle. In this work, we demonstrate if a swimmer subjected to a strong oscillating field which results in an instantaneous phase lag greater than , the swimmer can be steered perpendicularly to its original direction. Detailed swimming mechanism and trajectory are presented. By this innovative steering technology, orientation of a micro-swimmer can be effectively manipulated without a physical reconfiguration of the external field arrangement.

show abstract

“…The experimental procedure in this work is mostly the same with what has been addressed in Li et al [7]- [9]. Micro-sized magnetic particles are initially dispersed in distilled water.…”

Section: Methodsmentioning

confidence: 99%

Section: A Steers Of Micro-swimmersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Steering of Magnetic Micro-Swimmers

Lin

Chen

2013

IEEE Trans. Magn.

Self Cite

View full text Add to dashboard Cite

show abstract

“…[6][7][8][9][10][11] Magnetic actuation enables motion of the magnetic micro devises to be controlled wirelessly without affecting biological viability but with the extra benefit that the direction of motion can be determined by the field. 12,13 One of the challenges in proposing the micro devices to move in the low-Reynolds-number regime should be that a microswimmer must deform without structural instability in a way that is not invariant under time-reversal. Two possible ways to achieve the goal has been proposed by Purcell are corkscrew 14,15 and flexible motion.…”

Section: Introductionmentioning

confidence: 99%

Flexible mechanism of magnetic microbeads chains in an oscillating field

Yen

2018

AIP Advances

Self Cite

View full text Add to dashboard Cite

To investigate the use of magnetic microbeads for swimming at low Reynolds number, the flexible structure of microchains comprising superparamagnetic microbeads under the influence of oscillating magnetic fields is examined experimentally and theoretically. For a ductile chain, each particle has its own phase angle trajectory and phase-lag angle to the overall field. This present study thoroughly discusses the synchronicity of the local phase angle trajectory between each dyad of beads and the external field. The prominently asynchronous trajectories between the central and outer beads significantly dominate the flexible structure of the oscillating chain. In addition, the dimensionless local Mason number (Mnl) is derived as the solo controlling parameter to evaluate the structure of each dyad of beads in a flexible chain. The evolution of the local Mason number within an oscillating period implies the most unstable position locates near the center of the chain around 0.6P<t<0.8P. Moreover, a chain with a certain length in the influence of the oscillating field would behave the most significant deformation and have the most flexible structure.

show abstract

Structural instability of an oscillating superparamagnetic micro-bead chain

Lin

Chen

2013

Microfluid Nanofluid

View full text Add to dashboard Cite

Trajectory shift of magnetic microchains in an oscillating field

Cited by 14 publications

References 28 publications

Steering of Magnetic Micro-Swimmers

Steering of Magnetic Micro-Swimmers

Flexible mechanism of magnetic microbeads chains in an oscillating field

Structural instability of an oscillating superparamagnetic micro-bead chain

Contact Info

Product

Resources

About