论文标题
磁力的基本波在自组装中诱导运动
Magnetically powered metachronal waves induce locomotion in self-assemblies
论文作者
论文摘要
当微小的软铁磁颗粒沿着液体界面放置并暴露于垂直磁场时，毛细管吸引力和磁排斥之间的平衡会导致自组织成明确定义的模式。在这里，我们通过实验证明，进攻磁场会在这些组件的外围诱导过渡波，类似于在纤毛和某些节肢动物中观察到的基团。颗粒的最外层的表现就像纤毛或腿部的阵列，其顺序运动会导致净和可控制的运动。这种生物启动的多粒子游泳策略即使在较低的雷诺数下也有效，仅使用空间均匀的场来产生波浪。
When tiny soft ferromagnetic particles are placed along a liquid interface and exposed to a vertical magnetic field, the balance between capillary attraction and magnetic repulsion leads to self-organization into well-defined patterns. Here, we demonstrate experimentally that precessing magnetic fields induce metachronal waves on the periphery of these assemblies, similar to the ones observed in ciliates and some arthropods. The outermost layer of particles behaves like an array of cilia or legs whose sequential movement causes a net and controllable locomotion. This bioinspired many-particle swimming strategy is effective even at low Reynolds number, using only spatially uniform fields to generate the waves.
