Controlled propulsion of wheel-shape flaky microswimmers under rotating magnetic fields
Controlled propulsion of wheel-shape flaky microswimmers under rotating magnetic fields
复制标题
旋转磁场下轮状片状微型游泳器的受控推进
DOI：
10.1063/1.5090297
复制
发表时间：
2019-03-25
影响因子：
4
通讯作者：
Zhang, Deyuan
中科院分区：
文献类型：
--
作者：
Gong, De;Cai, Jun;Zhang, Deyuan
在低雷诺数下有效推进无系绳微/纳米机器人可以为有前途的生物医学应用提供可能性。已经提出了多种运动模式用于小规模推进，并且滚动是一种非常有效的替代方法。在这里，我们展示了大规模生产的磁轮形状的微型游泳器制造通过一个简单的和具有成本效益的方法。研究了垂直旋转磁场下的运动特性，分析了其推进机理。它们的前游方式有翻滚和翻滚两种，这两种方式依赖于驱动场和流体。滚动微型游泳器可以精确地推进和操纵，并且可以容易地达到高速度。分析了不同流场和流体条件下的前向速度和转捩频率，并观察了在一定外倾角下滚动时的侧滑效应。大量合成的这种具有不同运动模式和优异游泳性能的微游泳者在低雷诺数流体中具有潜在的应用前景，在低雷诺数下有效推进无束缚的微/纳米机器人可以为有前景的生物医学应用提供可能性。已经提出了多种运动模式用于小规模推进，并且滚动是一种非常有效的替代方法。在这里，我们展示了大规模生产的磁轮形状的微型游泳器制造通过一个简单的和具有成本效益的方法。研究了垂直旋转磁场下的运动特性，分析了其推进机理。它们的前游方式有翻滚和翻滚两种，这两种方式依赖于驱动场和流体。滚动微型游泳器可以精确地推进和操纵，并且可以容易地达到高速度。分析了不同流场和流体条件下的前向速度和转捩频率，并观察了在一定外倾角下滚动时的侧滑效应。这种微型游泳者大量合成，具有替代运动模式和出色的游泳能力。
Effective propulsion of untethered micro-/nanorobots at low Reynolds numbers can offer possibilities for promising biomedical applications. Diverse locomotion modes have been proposed for propulsion at a small scale, and rolling is an alternative method which is significantly effective. Here, we demonstrate mass produced magnetic wheel-shape flaky microswimmers fabricated via a simple and cost-effective method. Locomotion behaviors under vertical rotating magnetic fields were studied, and the propulsion mechanisms were analyzed. They exhibited two modes to swim forward as tumbling and rolling, which relied on the actuating field and the fluid. The rolling microswimmers could be propelled and steered precisely and a high velocity can be easily reached. Forward velocity and transition frequency within diverse fields and fluids were analyzed, and side slip effects when rolling at a camber angle were also observed. Such microswimmers synthesized in bulk with alternative locomotion modes and excellent swimming performances may have potential in low Reynolds number fluids.Effective propulsion of untethered micro-/nanorobots at low Reynolds numbers can offer possibilities for promising biomedical applications. Diverse locomotion modes have been proposed for propulsion at a small scale, and rolling is an alternative method which is significantly effective. Here, we demonstrate mass produced magnetic wheel-shape flaky microswimmers fabricated via a simple and cost-effective method. Locomotion behaviors under vertical rotating magnetic fields were studied, and the propulsion mechanisms were analyzed. They exhibited two modes to swim forward as tumbling and rolling, which relied on the actuating field and the fluid. The rolling microswimmers could be propelled and steered precisely and a high velocity can be easily reached. Forward velocity and transition frequency within diverse fields and fluids were analyzed, and side slip effects when rolling at a camber angle were also observed. Such microswimmers synthesized in bulk with alternative locomotion modes and excellent swimming...