Acoustophoresis of monodisperse oil droplets in water: effect of symmetry breaking and non-resonance operation on oil trapping behavior

H. Bazyar*, Mehmet Kandemir, J. Peper, M. A.B. Andrade, A. L. Bernassau, K. Schroën, R. G.H. Lammertink

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

11 Downloads (Pure)

Abstract

Acoustic manipulation of particles in microchannels has recently gained much attention. Ultrasonic standing wave (USW) separation of oil droplets or particles is an established technology for microscale applications. Acoustofluidic devices are normally operated at optimized conditions, namely, resonant frequency, to minimize power consumption. It has been recently shown that symmetry breaking is needed to obtain efficient conditions for acoustic particle trapping. In this work, we study the acoustophoretic behavior of monodisperse oil droplets (silicone oil and hexadecane) in water in the microfluidic chip operating at a non-resonant frequency and an off-center placement of the transducer. Finite element-based computer simulations are further performed to investigate the influence of these conditions on the acoustic pressure distribution and oil trapping behavior. Via investigating the Gor’kov potential, we obtained an overlap between the trapping patterns obtained in experiments and simulations. We demonstrate that an off-center placement of the transducer and driving the transducer at a non-resonant frequency can still lead to predictable behavior of particles in acoustofluidics. This is relevant to applications in which the theoretical resonant frequency cannot be achieved, e.g., manipulation of biological matter within living tissues.

Original languageEnglish
Article number064107
Number of pages13
JournalBiomicrofluidics
Volume17
Issue number6
DOIs
Publication statusPublished - 1 Dec 2023
MoE publication typeA1 Journal article-refereed

Fingerprint

Dive into the research topics of 'Acoustophoresis of monodisperse oil droplets in water: effect of symmetry breaking and non-resonance operation on oil trapping behavior'. Together they form a unique fingerprint.

Cite this