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Electrokinetic bioprocessor for concentrating cells and molecules
Pak Kin Wong1, Che-Yang Chen, Tza-Huei Wang
1Institute for Cell Mimetic Space Exploration (CMISE) and Department of Mechanical & Aerospace Engineering, University of California, Los Angeles, Los Angeles, California 90095, USA.
Analytical Chemistry
|December 2, 2004
Summary
This study presents a microfluidic processor that concentrates bioparticles like cells and DNA using ac electroosmosis and electrode forces. The bioprocessor effectively concentrates diverse biological targets, from bacteria to small DNA fragments.
Area of Science:
- Microfluidics
- Biotechnology
- Bioanalysis
Background:
- Concentrating bioparticles is crucial for bioanalysis.
- Existing methods face limitations in efficiency and range of particle sizes.
Purpose of the Study:
- To develop a microfluidic processor for efficient bioparticle concentration.
- To demonstrate the processor's capability across a wide range of biological targets.
Main Methods:
- Utilizing ac electroosmosis to generate a global flow field.
- Employing electrophoretic and dielectrophoretic forces for particle trapping.
- Optimizing operating parameters for enhanced concentration.
Main Results:
- Successfully concentrated various bioparticles, including Escherichia coli bacteria.
- Concentrated lambda phage DNA and single-stranded DNA fragments (as small as 20 bases).
- Demonstrated effective concentration of particles with radii as small as 3 nm.
Conclusions:
- The developed microfluidic processor is effective for concentrating diverse bioparticles.
- The system shows promise for applications in bioanalysis and biotechnology.
- Optimization of parameters allows for versatile bioparticle manipulation.