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A Protocol for Real-time 3D Single Particle Tracking

A Protocol for Real-time 3D Single Particle Tracking

Published on: January 3, 2018

DNA-based highly tunable particle focuser.

Kyowon Kang¹, Sung Sik Lee, Kyu Hyun

¹1] Department of Chemical Engineering, Ajou University, Suwon 443-749, Republic of Korea [2] Department of Energy Systems Research, Ajou University, Suwon 443-749, Republic of Korea.

Nature Communications

|October 11, 2013

Summary

This summary is machine-generated.

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DNA solutions enable efficient particle focusing in microfluidics. This discovery offers a tunable method for applications like portable flow cytometers and cell analysis.

Area of Science:

Biophysics
Microfluidics
Polymer Science

Background:

DNA's unique properties include long length and structural rigidity.
Classical polymer theories suggest DNA significantly enhances non-Newtonian elastic properties in dilute solutions.
These properties stem from DNA's larger size and longer relaxation time compared to synthetic polymers.

Purpose of the Study:

To exploit DNA's elastic properties for particle manipulation in microfluidic systems.
To demonstrate efficient particle focusing using extremely dilute DNA solutions.
To explore the potential of this technique in various biological and analytical applications.

Main Methods:

Utilizing Poiseuille microflow in an extremely dilute DNA solution (0.0005% w/v).

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Observing and quantifying the lateral migration and focusing of rigid spherical particles.

Investigating the efficiency and flow rate range of the particle focusing phenomenon.

Main Results:

Achieved highly efficient particle focusing (>99.5%) in dilute DNA solutions.
Demonstrated efficient focusing over an unprecedented wide range of flow rates (max/min ratio ~400).
Confirmed DNA as an effective elasticity enhancer due to its structural properties.

Conclusions:

DNA solutions provide a tunable and efficient method for particle focusing in microfluidic devices.
This technique has significant potential for developing cost-effective portable flow cytometers and high-throughput cell analysis systems.
The study highlights DNA's utility in cell sorting by size and other microfluidic applications.