Selecting active matter according to motility in an acoustofluidic setup: self-propelled particles and sperm cells

Misko, Vyacheslav R.; Baraban, Larysa; Makarov, Denys; Huang, Tao; Gelin, Pierre; Mateizel, Ileana; Wouters, Koen; De Munck, Neelke; Nori, Franco; De Malsche, Wim

doi:10.1039/d3sm01214j

Cited by 4 publications

(3 citation statements)

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“…It was shown that the effect of escape was observed in both stationary conditions, i.e., in the absence of external flows and when an externally driven fluid flow along the channel was applied. This selective escape can be useful for various applications where one needs to select active species from passive, for example, motile sperm cells from immotile, as was recently demonstrated elsewhere [29]. In this work, we focused on the escape of Janus particles and analyzed the distributions of active versus passive particles across the channel width.…”

Section: Discussionmentioning

confidence: 91%

“…Note that passive Brownian particles, which execute random walk, are characterized by zero persistence length. The motility of self-propelled particles is the measure of their ability to escape from an acoustic trap, the same as natural swimmers like sperm cells [29].…”

Section: Self-propelled Motion Of Janus Particles and Motilitymentioning

confidence: 99%

“…The same experiment was conducted where the 10% hydrogen peroxide was replaced with deionized water. There was no fuel anymore; thus, no escape from the acoustic trap could be observed (see also [29]).…”

Section: Escape Of Motile Janus Particles From Acoustic Trapmentioning

confidence: 99%

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Janus Particles in Acoustofluidic Setup: The Interplay between Self-Propulsion and Acoustic Trapping

Benko,

Misko,

Baraban

et al. 2024

Micro

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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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Section: Discussionmentioning

confidence: 91%

Section: Self-propelled Motion Of Janus Particles and Motilitymentioning

confidence: 99%