A novel electrokinetic micromixer

Hsin Yu Wu, Cheng Hsien Liu

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

We propose and successfully demonstrate a novel microfluidic mixer that takes advantage of field-effect control to dynamically manipulate local flow field to highly enhance mixing effect in microchannel. Theoretical analyses and numerical simulation have been done, including the influences of buffer pH, electrolyte concentration, and radial voltage on the ζ-potential, and the flow field analysis with nonuniform ζ-potential. Experimental results of fluid mixing for our electrokinetic micromixer have been characterized and indicate that over 90% mixing efficiency can be achieve for a 5 mm long microchannel. The velocity profile distortion resulting from nonuniform ζ-potential is also observed. The work reported here is considered as the first time temporal/spatial ζ-potential modulation for microfluidic mixer applications.

Original languageEnglish
Pages (from-to)107-115
Number of pages9
JournalSensors and Actuators, A: Physical
Volume118
Issue number1
DOIs
Publication statusPublished - Jan 31 2005
Externally publishedYes

Fingerprint

electrokinetics
Microchannels
Microfluidics
Flow fields
microchannels
flow distribution
Mixer circuits
Electrolytes
Buffers
Modulation
Fluids
buffers
velocity distribution
Computer simulation
Electric potential
electrolytes
modulation
fluids
electric potential
simulation

Keywords

  • ζ-potential
  • Electroosmotic flow
  • Field-effect control
  • MEMS
  • Microfluidic mixer

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Instrumentation

Cite this

A novel electrokinetic micromixer. / Wu, Hsin Yu; Liu, Cheng Hsien.

In: Sensors and Actuators, A: Physical, Vol. 118, No. 1, 31.01.2005, p. 107-115.

Research output: Contribution to journalArticle

Wu, Hsin Yu ; Liu, Cheng Hsien. / A novel electrokinetic micromixer. In: Sensors and Actuators, A: Physical. 2005 ; Vol. 118, No. 1. pp. 107-115.
@article{7c9e643c6feb44e0a0bf7afa1476fe46,
title = "A novel electrokinetic micromixer",
abstract = "We propose and successfully demonstrate a novel microfluidic mixer that takes advantage of field-effect control to dynamically manipulate local flow field to highly enhance mixing effect in microchannel. Theoretical analyses and numerical simulation have been done, including the influences of buffer pH, electrolyte concentration, and radial voltage on the ζ-potential, and the flow field analysis with nonuniform ζ-potential. Experimental results of fluid mixing for our electrokinetic micromixer have been characterized and indicate that over 90{\%} mixing efficiency can be achieve for a 5 mm long microchannel. The velocity profile distortion resulting from nonuniform ζ-potential is also observed. The work reported here is considered as the first time temporal/spatial ζ-potential modulation for microfluidic mixer applications.",
keywords = "ζ-potential, Electroosmotic flow, Field-effect control, MEMS, Microfluidic mixer",
author = "Wu, {Hsin Yu} and Liu, {Cheng Hsien}",
year = "2005",
month = "1",
day = "31",
doi = "10.1016/j.sna.2004.06.032",
language = "English",
volume = "118",
pages = "107--115",
journal = "Sensors and Actuators, A: Physical",
issn = "0924-4247",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - A novel electrokinetic micromixer

AU - Wu, Hsin Yu

AU - Liu, Cheng Hsien

PY - 2005/1/31

Y1 - 2005/1/31

N2 - We propose and successfully demonstrate a novel microfluidic mixer that takes advantage of field-effect control to dynamically manipulate local flow field to highly enhance mixing effect in microchannel. Theoretical analyses and numerical simulation have been done, including the influences of buffer pH, electrolyte concentration, and radial voltage on the ζ-potential, and the flow field analysis with nonuniform ζ-potential. Experimental results of fluid mixing for our electrokinetic micromixer have been characterized and indicate that over 90% mixing efficiency can be achieve for a 5 mm long microchannel. The velocity profile distortion resulting from nonuniform ζ-potential is also observed. The work reported here is considered as the first time temporal/spatial ζ-potential modulation for microfluidic mixer applications.

AB - We propose and successfully demonstrate a novel microfluidic mixer that takes advantage of field-effect control to dynamically manipulate local flow field to highly enhance mixing effect in microchannel. Theoretical analyses and numerical simulation have been done, including the influences of buffer pH, electrolyte concentration, and radial voltage on the ζ-potential, and the flow field analysis with nonuniform ζ-potential. Experimental results of fluid mixing for our electrokinetic micromixer have been characterized and indicate that over 90% mixing efficiency can be achieve for a 5 mm long microchannel. The velocity profile distortion resulting from nonuniform ζ-potential is also observed. The work reported here is considered as the first time temporal/spatial ζ-potential modulation for microfluidic mixer applications.

KW - ζ-potential

KW - Electroosmotic flow

KW - Field-effect control

KW - MEMS

KW - Microfluidic mixer

UR - http://www.scopus.com/inward/record.url?scp=9944243120&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=9944243120&partnerID=8YFLogxK

U2 - 10.1016/j.sna.2004.06.032

DO - 10.1016/j.sna.2004.06.032

M3 - Article

AN - SCOPUS:9944243120

VL - 118

SP - 107

EP - 115

JO - Sensors and Actuators, A: Physical

JF - Sensors and Actuators, A: Physical

SN - 0924-4247

IS - 1

ER -