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Updated: May 10, 2026

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

Pushbutton-activated microfluidic cell-free biosensor for multiplexed pathogen detection.

Dong Hyun Han¹, Yurim Kim¹, Yu Jin Park²

¹Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea. jekyun@kaist.ac.kr.

|October 10, 2025

Summary

This summary is machine-generated.

A novel cell-free biosensor uses a multiplexed pushbutton-activated microfluidic device (mPAMD) for simultaneous pathogen detection. This accessible diagnostic platform offers high sensitivity and specificity for 16S rRNAs.

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Area of Science:

Biotechnology
Microfluidics
Biosensors

Background:

Pathogen detection is crucial for public health.
Existing methods often lack multiplexing capabilities or require complex instrumentation.
Cell-free systems offer rapid and adaptable diagnostic solutions.

Purpose of the Study:

To develop a novel cell-free biosensor for simultaneous detection of multiple 16S rRNAs.
To integrate multi-step cell-free protein synthesis into a single microfluidic device.
To create an accessible and intuitive diagnostic platform.

Main Methods:

Development of a multiplexed pushbutton-activated microfluidic device (mPAMD).
Integration of target-responsive cell-free protein synthesis with finger-pumping mechanism.
Design and optimization of microchannels for efficient mixing and reagent distribution.
Incorporation of multiplexed detection zones with pathogen-specific probes.

Main Results:

Simultaneous detection of multiple 16S rRNAs achieved in a single device.
Achieved a detection limit for 16S rRNA ranging from 1.69 to 7.39 pM.
Demonstrated high sensitivity and specificity for pathogen identification.
System corresponds to approximately 10^4 to 10^5 CFU mL^-1 of pathogens.

Conclusions:

The mPAMD provides a simple, intuitive, and accessible multiplexed diagnostic platform.
The developed cell-free biosensor addresses the demand for sensitive and specific pathogen detection.
This technology holds potential for rapid point-of-care diagnostics.