Electrokinetic focusing and separation of mammalian cells in conductive biological fluids

Jian Gao, Reza Riahi, Mandy L Y Sin, Shufeng Zhang, Pak Kin Wong

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Active manipulation of cells, such as trapping, focusing, and isolation, is essential for various bioanalytical applications. Herein, we report a hybrid electrokinetic technique for manipulating mammalian cells in physiological fluids. This technique applies a combination of negative dielectrophoretic force and hydrodynamic drag force induced by electrohydrodynamics, which is effective in conductive biological fluids. With a three-electrode configuration, the stable equilibrium positions of cells can be adjusted for separation and focusing applications. Cancer cells and white blood cells can be positioned and isolated into specific locations in the microchannel under both static and dynamic flow conditions. To investigate the sensitivity of the hybrid electrokinetic process, AC voltage, frequency, and bias dependences of the cell velocity were studied systematically. The applicability of the hybrid electrokinetic technique for manipulating cells in physiological samples is demonstrated by continuous focusing of human breast adenocarcinoma spiked in urine, buffy coats, and processed blood samples with 98% capture efficiency. This journal is

Original languageEnglish (US)
Pages (from-to)5215-5221
Number of pages7
JournalAnalyst
Volume137
Issue number22
DOIs
StatePublished - Nov 21 2012

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Cell Separation
Cells
Fluids
fluid
Blood
blood
Electrohydrodynamics
Microchannels
urine
drag
Drag
trapping
cancer
electrode
Blood Buffy Coat
Hydrodynamics
hydrodynamics
Electrodes
Electric potential
electrokinetics

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Electrochemistry
  • Biochemistry
  • Environmental Chemistry

Cite this

Electrokinetic focusing and separation of mammalian cells in conductive biological fluids. / Gao, Jian; Riahi, Reza; Sin, Mandy L Y; Zhang, Shufeng; Wong, Pak Kin.

In: Analyst, Vol. 137, No. 22, 21.11.2012, p. 5215-5221.

Research output: Contribution to journalArticle

Gao, Jian ; Riahi, Reza ; Sin, Mandy L Y ; Zhang, Shufeng ; Wong, Pak Kin. / Electrokinetic focusing and separation of mammalian cells in conductive biological fluids. In: Analyst. 2012 ; Vol. 137, No. 22. pp. 5215-5221.
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