Micromixing using swirling induced by three-dimensional dual surface acoustic waves (3D-dSAW)

Jeonghun Nam, Chae Seung Lim

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Efficient mixing in a microfluidic system is difficult to achieve, since it is dependent solely on molecular diffusion due to low Reynolds number. In this paper, we newly propose a novel mixing technique using three-dimensional dual surface acoustic waves (3D-dSAWs) generated from two interdigitated transducers of top and bottom piezoelectric substrates. By using the 3D-dSAW, internal swirling in a single direction is induced, which can facilitate more efficient mixing of a fluorescent particle suspension and deionized water. Therefore, by using the 3D-dSAW mixer, higher efficiency mixing performance can be achieved compared to the single SAW mixer at the same flow rate and applied voltage. With the applied voltage of 14. V, 3D-dSAW mixing device could achieve 100% mixing efficiency at the flow rate of 50. μl/min, while the mixing efficiency of the traditional single SAW mixer was approximately 38%. Moreover, the throughput of 3D-dSAW mixing device could be enhanced up to 120. μl/min with the applied voltage of 18. V, at which the measured temperature was lower than 40. °C and the efficiency could reach approximately ∼95.6%.

Original languageEnglish
JournalSensors and Actuators, B: Chemical
DOIs
Publication statusAccepted/In press - 2017

Keywords

  • Acoustic streaming
  • Micromixer
  • Surface acoustic wave
  • Swirling

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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