Electromagnetic fields are commonly used to control small quantities of fluids in microfluidics and digital microfluidics. Magnetic control techniques are less well studied than their electric counterparts, with only a few investigations into liquid diamagnetism. The ratio of magnetic to surface energy (magnetic Bond number B m ) is an order of magnitude smaller for diamagnetic drops ( B m ≈ - 0.3 at 1.2 T applied field) than for paramagnetic drops ( B m ≈ 9.0 at 1.2 T applied field). This weaker interaction between the magnetic field and the diamagnetic drop has led to the phenomenon being overlooked in digital microfluidics. Here, we investigate shaping and transport of diamagnetic drops using magnetostatic fields. Our findings highlight how diamagnetic fluids can be used as a novel tool in the toolbox of microfluidics and digital microfluidics.

中文翻译：

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塑造和运输抗磁性无柄滴。

电磁场通常用于控制微流体和数字微流体中的少量流体。磁控制技术没有像电控制技术那样被很好地研究，只有很少的关于液态抗磁性的研究。与顺磁滴（1.2 T施加磁场时B m≈9.0）相比，抗磁滴（在1.2 T施加磁场时B m≈-0.3）的磁能与表面能之比（磁键数B m）要小一个数量级。 。磁场和抗磁性液滴之间较弱的相互作用导致数字微流体中忽略了该现象。在这里，我们研究使用静磁场的反磁性液滴的成形和运输。我们的发现强调了抗磁流体如何在微流体和数字微流体工具箱中用作新型工具。