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Updated: Apr 29, 2026

A Microfluidic-based Hydrodynamic Trap for Single Particles

A Microfluidic-based Hydrodynamic Trap for Single Particles

Published on: January 21, 2011

A high-efficiency microfluidic device for size-selective trapping and sorting.

Jinho Kim¹, Jessey Erath, Ana Rodriguez

¹Department of Electrical Engineering, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, USA. jkkim@caltech.edu.

|May 23, 2014

Summary

This summary is machine-generated.

This study introduces a novel poly(dimethylsiloxane) microfluidic device for efficient particle trapping and sorting. The innovative design successfully sorts various microsphere sizes and waterborne parasites with high accuracy.

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Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets

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Area of Science:

Biotechnology
Microfluidics
Materials Science

Background:

Microfluidic devices are crucial for particle manipulation.
Efficient and high-throughput sorting of micron-size particles remains a challenge.
Current methods often lack modularity and scalability.

Purpose of the Study:

To develop a simple, modular poly(dimethylsiloxane) microfluidic device.
To achieve high-efficiency trapping and sorting of micron-size particles.
To demonstrate the device's capability in sorting both synthetic microspheres and biological samples.

Main Methods:

Fabrication of a poly(dimethylsiloxane) microfluidic device with sieve-like channels and side channels.
Utilizing hydrodynamic flow for sequential particle trapping based on size.
Decoupling fluidic flow between stages for modularity.
Experimental validation using polystyrene microspheres (15 μm, 6 μm, 4 μm) and waterborne parasites (Entamoeba, Giardia, Cryptosporidium).

Main Results:

Achieved >85% sorting efficiency for polystyrene microspheres of different sizes.
Demonstrated complete trapping of all introduced microspheres.
Obtained excellent sorting performance for three species of waterborne parasites.

Conclusions:

The developed microfluidic device offers a simple and efficient solution for particle sorting.
The modular design allows for scalable and adaptable particle manipulation.
The device shows significant potential for applications in biological sample analysis and purification.