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Acoustofluidic Relay: Sequential Trapping and Transporting of Microparticles via Acoustically Excited Oscillating Bubbles
Journal article   Open access

Acoustofluidic Relay: Sequential Trapping and Transporting of Microparticles via Acoustically Excited Oscillating Bubbles

Yuliang Xie, Daniel Ahmed, Michael Ian Lapsley, Mengqian Lu, Sixing Li and Tony Jun Huang
Journal of Laboratory Automation, Vol.19(2), pp.137-143
04/2014
DOI: 10.1177/2211068213485748
PMID: 23592570
url
https://doi.org/10.1177/2211068213485748View
Published (Version of record) Open Access

Abstract

We report an on-chip acoustofluidic method for sequential trapping and transporting of microparticles via acoustically oscillating bubbles. The size and location of bubbles were precisely controlled by lithography. When the acoustic waves were turned off, particles followed the streamlines dictated by laminar flow. When the acoustic waves were turned on, particles were attracted to and trapped in a vortex near the surface of bubble. Therefore, particles could move across the microfluidic channel with programmed trajectories. Additionally, a theoretical model based on acoustic radiation force and drag force due to acoustic microstreaming was established to help design this particle-trapping and -transporting system.
microbubble particle transfer acoustofluidics radiation force

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