Flexible Magnetic Filaments and their Applications

Cēbers, A.; Ērglis, Kaspars

doi:10.1002/adfm.201502696

Cited by 44 publications

(27 citation statements)

References 49 publications

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“…In recent years a variety of research teams have studied chain behaviors such as actuation via bending [27][28][29], buckling transitions [30], desynchronization in slowly rotating fields [31], swimming [32], and pumping [33,34]. Most work to date has focused on static [35,36] or relatively slow field changes with single filaments [37]. In this work, we combine analytics and simulations to study the behavior of isolated and bulk filaments in dynamic magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

Contractile actuation and dynamical gel assembly of paramagnetic filaments in fast precessing fields

Dempster¹,

Vázquez-Montejo²,

Cruz³

2017

Phys. Rev. E

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Flexible superparamagnetic filaments are studied under the influence of fast precessing magnetic fields using simulations and a continuum approximation analysis. We find that individual filaments can be made to exert controllable tensile forces along the precession axis. These forces are exploited for microscopic actuation. In bulk, the filaments can be rapidly assembled into different configurations whose material properties depend on the field parameters. The precession frequency affects filament aggregation and conformation by changing the net torques on the filament ends. Using a time-dependent precession angle allows considerable freedom in choosing properties for filament aggregates. As an example, we design a field that twists chains together to dynamically assemble a self-healing gel.

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Section: Introductionmentioning

confidence: 99%

Contractile actuation and dynamical gel assembly of paramagnetic filaments in fast precessing fields

Dempster¹,

Vázquez-Montejo²,

Cruz³

2017

Phys. Rev. E

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“…MFs can nowadays be found in diverse applications [8,9,10,11]. They can serve as artificial swimmers [12,13], for cellular engineering [14,15] and for bio-mimetic cilia designs [16,17].…”

Section: Introductionmentioning

confidence: 99%

The influence of crosslinkers and magnetic particle distribution along the filament backbone on the magnetic properties of supracolloidal linear polymer-like chains

Mostarac

Vaughan

Sánchez

et al. 2020

Journal of Magnetism and Magnetic Materials

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A B S T R A C TDiverse polymer crosslinking techniques allow the synthesis of linear polymer-like structures whose monomers are colloidal particles. In the case where all or part of these colloidal particles are magnetic, one can control the behaviour of these supracolloidal polymers, known as magnetic filaments (MFs), by applied magnetic fields. However, the response of MFs strongly depends on the crosslinking procedure. In the present study, we employ Langevin dynamics simulations to investigate the influence of the type of crosslinking and the distribution of magnetic particles within MFs on their response to an external magnetic field. We found that if the rotation of the dipole moment of particles is not coupled to the backbone of the filament, the impact of the magnetic content is strongly decreased.

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“…Such filaments have numerous potential applications. Chains of magnetic particles can be used as self-propelling devices for drug and cargo delivery, as magnetically controlled microfluidic mixers and as micromechanical sensors [3,4,5,6]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium properties of magnetic filament suspensions

Кузнецов

2019

Journal of Magnetism and Magnetic Materials

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Langevin dynamics is used to study equilibrium properties of the suspension of magnetic filaments (chains of nanoparticles permanently crosslinked with polymers). It is shown that the filament suspension generally has larger magnetic susceptibility than the system of unlinked nanoparticles with the same average particle concentration. However, actual susceptibility gain strongly depends on length and flexibility of filaments. It also shown that in a strong gravitational (centrifugal) field sedimentation profiles of filaments are less homogeneous than that of unlinked particles. The spatial distribution of filaments weakly depends on the intensity of interparticle dipole-dipole interactions.Comment: 8 pages, 6 figures, accepted for publication in Journal of Magnetism and Magnetic Material

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Flexible Magnetic Filaments and their Applications

Cited by 44 publications

References 49 publications

Contractile actuation and dynamical gel assembly of paramagnetic filaments in fast precessing fields

Contractile actuation and dynamical gel assembly of paramagnetic filaments in fast precessing fields

The influence of crosslinkers and magnetic particle distribution along the filament backbone on the magnetic properties of supracolloidal linear polymer-like chains

Equilibrium properties of magnetic filament suspensions

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