Related Experiment Videos
Microfluidic particle sorter employing flow splitting and recombining.
1Department of Chemistry and Biotechnology, School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Analytical Chemistry
|February 16, 2006
Summary
This study presents an improved microfluidic device for continuous particle concentration and size-dependent separation. The novel design enhances sorting efficiency, selectivity, and recovery rates for particles in suspension.
Area of Science:
- Biotechnology
- Microfluidics
- Particle Science
Background:
- Previous work established hydrodynamic filtration and sorting in microchannels for particle and cell separation.
- Continuous concentration and separation methods are crucial for various biological and chemical applications.
Purpose of the Study:
- To develop an improved microfluidic device for continuous, size-dependent particle separation.
- To enhance the efficiency, selectivity, and recovery rates of hydrodynamic particle sorting.
Main Methods:
- A microfluidic device with a specific geometry for splitting and recombining fluid flow was designed and fabricated.
- Hydrodynamic forces were utilized to guide particles based on their size towards sidewalls.
- A microchannel with one inlet and five outlets was used to collect separated particles.
Main Results:
- Particle concentrations of 2.1-3.0-micrometer particles were increased 60-80 fold.
- Size-dependent separation and independent collection of particles from each outlet were achieved.
- Flow rates distributed into side channels closely matched theoretical predictions.
Conclusions:
- The improved microfluidic device offers highly efficient and selective continuous particle separation.
- The design enhances particle recovery rates without requiring carrier-free liquids.
- This technology has significant potential for applications in particle analysis and purification.