Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Janus Particles in Acoustofluidic setup: The Interplay between Self‐Propulsion and Acoustic Trapping

Lisa Marie Benko
ORCID logo ,
Vyacheslav R. Misko
* ORCID logo ,
Larysa Baraban
,
Denys Makarov
ORCID logo ,
Antonio Maisto
ORCID logo ,
Wim De Malsche
* ORCID logo
Version 1 : Received: 20 February 2024 / Approved: 20 February 2024 / Online: 20 February 2024 (17:10:42 CET)

A peer-reviewed article of this Preprint also exists.

Benko, L.M.; Misko, V.R.; Baraban, L.; Makarov, D.; Maisto, A.; Malsche, W.D. Janus Particles in Acoustofluidic Setup: The Interplay between Self-Propulsion and Acoustic Trapping. Micro 2024, 4, 185-195. Benko, L.M.; Misko, V.R.; Baraban, L.; Makarov, D.; Maisto, A.; Malsche, W.D. Janus Particles in Acoustofluidic Setup: The Interplay between Self-Propulsion and Acoustic Trapping. Micro 2024, 4, 185-195.

Abstract

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 is investigated. In experiments with self-propelled Janus particles and passive beads, we explore the interplay between self-propulsion and the acoustic radiation force. Our results demonstrate unusual and potentially useful effects such as selective trapping, escape and assisted escape in binary mixtures of active and passive particles. We also analyze various aspects related to the behavior of Janus particles in acoustic traps in the presence and absence of flows.

Keywords

Acoustofluidics; Janus particles; Particle focusing; Acoustic streaming; separation

Subject

Chemistry and Materials Science, Chemical Engineering

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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