声流体装置中的杰纳斯粒子:自推进与声捕获之间的相互作用

Micro Pub Date : 2024-03-16 DOI:10.3390/micro4010013
Lisa Marie Benko, V.R. Misko, L. Baraban, D. Makarov, Antonio Maisto, W. Malsche
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引用次数: 0

摘要

在微流体中对粒子流进行声聚焦已被证明是一种有效的粒子分离工具,可用于各种化学和生物医学应用。这种方法背后的机制是声辐射力对不同颗粒的选择性效应。这样,它们就能被选择性地聚焦和分离。该技术还可以在静止条件下应用,即在没有流体流动的情况下。在这项研究中,研究了在声流体装置中操纵自推进粒子(如 Janus 粒子)的问题。在自推进 Janus 粒子和被动珠的实验中,我们探索了自推进力和声辐射力之间的相互作用。我们的结果表明,在主动和被动粒子的二元混合物中,存在选择性捕获、逃逸和辅助逃逸等不同寻常且潜在有用的效应。我们还分析了简纳斯粒子在声学陷阱中存在和不存在流动时的行为的各个方面。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Janus Particles in Acoustofluidic Setup: The Interplay between Self-Propulsion and Acoustic Trapping
Acoustic focusing of particle flow in microfluidics has been shown to be an efficient tool for particle separation for various chemical and biomedical applications. The mechanism behind the method is the selective effect of the acoustic radiation force on distinct particles. In this way, they can be selectively focused and separated. The technique can also be applied under stationary conditions, i.e., in the absence of fluid flows. In this study, the manipulation of self-propelled particles, such as Janus particles, in an acoustofluidic setup was investigated. In experiments with self-propelled Janus particles and passive beads, we explored the interplay between self-propulsion and the acoustic radiation force. Our results demonstrated unusual and potentially useful effects such as selective trapping, escape, and assisted escape in binary mixtures of active and passive particles. We also analyzed various aspects related to the behavior of Janus particles in acoustic traps in the presence and absence of flows.
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