Time-Varying Magnetic Field to Enhance the Navigation of Magnetic Microparticles in a Bifurcated Channel

IF 1.1 4区物理与天体物理 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Magnetics Letters Pub Date : 2022-01-27 DOI:10.1109/LMAG.2022.3146846

Pralay Chakrabarty;Roy P. Paily

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引用次数: 1

Abstract

This letter investigates the navigation of magnetic microparticles (MMPs) in a Y-shaped microfluidic channel under the influence of an external magnetic field. The external magnetic field exerts a magnetic force on the magnetizable MMPs to steer them from the bifurcation point to the desired channel. During this process, some MMPs aggregate and stick to the channel walls, thus reducing the efficacy of the navigation process. To mitigate this problem, a time-varying magnetic field (TVMF) is applied for efficient navigation of the MMPs in the channel. The TVMF alternately switches between two modes of operation described as follows. In the first mode of operation, the TVMF is applied for a certain time duration to generate the magnetic force required for steering the MMPs to the desired outlet. The second mode of operation facilitates mitigation of the stiction and aggregation of MMPs by modulating the TVMF and time duration of operation, so as to yield a lower magnetic force in the reverse direction to that in the first mode. Extensive simulations are performed to analyze the switching time for effective steering of the MMPs using COMSOL Multiphysics. Results illustrate that the time duration between the two modes of operation should be set using a ratio of 3

$:$

1 for effective guidance of the MMPs to the correct outlet.

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时变磁场增强磁性微粒在分叉通道中的导航

这封信研究了磁性微粒（MMPs）在外部磁场影响下在Y形微流体通道中的导航。外部磁场在可磁化MMP上施加磁力，将其从分叉点引导到所需通道。在这个过程中，一些MMP聚集并粘附在通道壁上，从而降低了导航过程的效率。为了缓解这个问题，时变磁场（TVMF）被应用于信道中MMP的有效导航。TVMF在两种操作模式之间交替切换，如下所述。在第一种操作模式中，TVMF被施加一定的持续时间，以产生将MMP转向所需出口所需的磁力。第二种操作模式通过调节TVMF和操作持续时间来促进MMP的静摩擦和聚集的减轻，从而在与第一种模式相反的方向上产生较低的磁力。使用COMSOL Multiphysics进行了广泛的模拟，以分析MMP有效操纵的切换时间。结果表明，两种操作模式之间的持续时间应使用3$:$1的比率设置，以有效引导MMP到达正确的出口。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Magnetics Letters PHYSICS, APPLIED-

CiteScore

2.40

自引率

0.00%

发文量

期刊介绍： IEEE Magnetics Letters is a peer-reviewed, archival journal covering the physics and engineering of magnetism, magnetic materials, applied magnetics, design and application of magnetic devices, bio-magnetics, magneto-electronics, and spin electronics. IEEE Magnetics Letters publishes short, scholarly articles of substantial current interest. IEEE Magnetics Letters is a hybrid Open Access (OA) journal. For a fee, authors have the option making their articles freely available to all, including non-subscribers. OA articles are identified as Open Access.