Paddlebots: Translation of Rotating Colloidal Assemblies near an Air/Water Interface
Paddlebots: Translation of Rotating Colloidal Assemblies near an Air/Water Interface
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Paddlebots：空气/水界面附近旋转胶体组件的平移
DOI：
10.1021/acs.langmuir.3c00701
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发表时间：
2023
期刊：
影响因子：
3.9
通讯作者：
Marr, D.W.M.
中科院分区：
文献类型：
--
作者：
Wolvington, E.;Yeager, L.;Gao, Y.;Zimmermann, C.J.;Marr, D.W.M.
微机器人推进需要独特的策略，由于粘度的主导地位和可逆性的微尺度流动。为了解决这个问题，通常使用在大量流体中平移的特定结构的游泳者;然而，另一种方法是利用液体/固体表面的固有不对称性使微型机器人（μ机器人）行走或滚动。使用这种技术，我们以前已经证明，超顺磁性胶体颗粒可以组装成小的μ机器人，它可以快速地沿着沿着固体表面滚动。在类似的方法中，我们在这里表明，对称性可以类似地在空气/液体界面附近被打破，并且μ机器人以与液体/固体界面所展示的速率相当的速率推进。
Microbot propulsion requires unique strategies due to the dominance of viscosity and the reversible nature of microscale flows. To address this, swimmers of specific structure that translate in bulk fluid are commonly used; however, another approach is to take advantage of the inherent asymmetry of liquid/solid surfaces for microbots (μbots) to walk or roll. Using this technique, we have previously demonstrated that superparamagnetic colloidal particles can be assembled into small μbots, which can quickly roll along solid surfaces. In an analogous approach, here we show that symmetry can be similarly broken near air/liquid interfaces and μbots propelled at rates comparable to those demonstrated for liquid/solid interfaces.