Acoustofluidic Relay: Sequential Trapping and Transporting of Microparticles via Acoustically Excited Oscillating Bubbles. (April 2014)

• Record Type: Journal Article
• Authors: Xie, Yuliang; Ahmed, Daniel; Lapsley, Michael Ian; Lu, Mengqian; Li, Sixing; Huang, Tony Jun
• Is Part Of: Journal of laboratory automation. Volume 19:Number 2(2014:Apr.)
• Page Start: 137
• Page End: 143
• Publication Date: 2014-04
• Subjects: acoustofluidics -- microbubble -- particle transfer -- radiation force; Medical laboratory technology -- Periodicals; Laboratories -- Equipment and supplies -- Periodicals; Diagnosis, Laboratory -- Periodicals; 616.075
• DOI: 10.1177/2211068213485748
• Languages: English
• ISSNs: 2211-0682

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.