Micromixing using a conductive liquid-based focused surface acoustic wave (CL-FSAW)

Jeonghun Nam, Woong Sik Jang, Chae Seung Lim

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Acoustic manipulation of fluids and particles has gained much attention in microfluidics, owing to its advantages of non-invasive manipulation and low power consumption. Microchannel mixing has been limited to diffusion-based mixing, because of low Reynolds number that has a low mixing efficiency. In this study, we firstly introduce a conductive liquid-based focused surface acoustic wave (CL-FSAW) device for mixing. Using the concentrated acoustic force of CL-FSAW, rapid and efficient mixing of deionized water and fluorescent particle suspension was demonstrated in a microfluidic channel. Effects of the applied voltage and the flow rate on the mixing efficiencies were investigated. As the flow rate decreased or the applied voltage increased, the mixing efficiency increased. At 21 V, mixing efficiencies were higher than 90% at a flow rate lower than 120 μL min−1. In addition, our device was applied to silver nanoparticle synthesis at the optimal mixing condition (100 μL min−1 and 21 V).

Original languageEnglish
Pages (from-to)991-997
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume258
DOIs
Publication statusPublished - 2018 Apr 1

Fingerprint

Surface waves
Acoustic waves
acoustics
Liquids
liquids
flow velocity
Flow rate
Microfluidics
manipulators
Acoustics
Acoustic surface wave devices
surface acoustic wave devices
Deionized water
low Reynolds number
Electric potential
electric potential
microchannels
Microchannels
Silver
Suspensions

Keywords

  • Conductive liquid
  • Focused surface acoustic wave
  • Micromixing

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

Cite this

Micromixing using a conductive liquid-based focused surface acoustic wave (CL-FSAW). / Nam, Jeonghun; Jang, Woong Sik; Lim, Chae Seung.

In: Sensors and Actuators, B: Chemical, Vol. 258, 01.04.2018, p. 991-997.

Research output: Contribution to journalArticle

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