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Updated: Feb 23, 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

A hybrid resistive pulse-optical detection platform for microfluidic experiments.

Preston Hinkle¹, Trisha M Westerhof², Yinghua Qiu³

¹Department of Physics and Astronomy, University of California, Irvine, Irvine, CA, 92617, USA. thinkle@uci.edu.

Scientific Reports

|September 2, 2017

Summary

This summary is machine-generated.

This study combines electrical and optical detection to improve particle characterization using resistive-pulse sensing. Simultaneous tracking resolves particle position, enhancing accuracy for individual particle analysis.

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Last Updated: Feb 23, 2026

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Area of Science:

Biophysics
Nanotechnology
Analytical Chemistry

Background:

Resistive-pulse sensing is a label-free technique for analyzing individual particles translocating through nanopores.
The resistive pulse signal's amplitude is influenced by particle size, channel dimensions, and particle position.
Resolving particle position is challenging using resistive pulse data alone.

Purpose of the Study:

To develop a hybrid method combining electrical and optical detection for enhanced particle characterization.
To investigate and resolve the positional dependencies of resistive pulses.
To improve the accuracy of individual particle analysis and enable observation of dynamic changes.

Main Methods:

Simultaneous electrical (resistive-pulse) and optical detection of particles.
Utilizing microfluidic channels for controlled particle translocation.
Tracking particle position and correlating it with resistive pulse amplitude in real-time.

Main Results:

Established a method for simultaneously measuring electrical and optical signals during particle translocation.
Created a mapping between particle position within the channel and resistive pulse amplitude.
Demonstrated improved accuracy in particle characterization by accounting for positional effects.

Conclusions:

Simultaneous electrical and optical detection offers a powerful approach to overcome limitations in resistive-pulse sensing.
This hybrid technique enhances the accuracy of individual particle characterization.
The method paves the way for studying dynamic particle properties like deformation and orientation, advancing high-throughput analysis.