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Related Experiment Video

Updated: Jan 22, 2026

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
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Microfluidic Time-Division Multiplexing Accessing Resistive Pulse Sensor for Particle Analysis.

Gihoon Choi1, Erica Murphy1, Weihua Guan1,2

  • 1Department of Electrical Engineering , Pennsylvania State University , University Park , Pennsylvania 16802 , United States.

ACS Sensors
|July 3, 2019
PubMed
Summary
This summary is machine-generated.

A novel microfluidic sensor uses time-division multiple access (TDMA) to analyze particles through many channels, overcoming scalability and clogging issues common in resistive pulse sensing. This multiplexed approach enhances particle detection and analysis capabilities.

Keywords:
microporemultiplexednanoporeresistive pulse sensortime-division multiple access

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Area of Science:

  • Microfluidics
  • Nanotechnology
  • Particle Analysis

Background:

  • Pore-based resistive pulse sensors are widely used for particle detection across nano- to micrometer scales.
  • Current multi-pore systems face scalability limitations and clogging challenges, hindering throughput.
  • Existing methods struggle with robust, high-throughput analysis of diverse particle populations.

Purpose of the Study:

  • To develop a scalable and clog-resistant single-end resistive pulse sensor.
  • To integrate microfluidics with time-division multiple access (TDMA) for multiplexed particle analysis.
  • To demonstrate the effectiveness of the TDMA approach for particle characterization.

Main Methods:

  • Developed a microfluidic device incorporating multiple sensing channels.
  • Implemented a time-division multiple access (TDMA) technique for sequential channel access.
  • Utilized polystyrene particles for proof-of-principle experiments to validate sensor performance.

Main Results:

  • Successfully demonstrated multiplexed particle analysis through a scalable number of microfluidic channels.
  • Accurately measured particle size and concentration, analyzed arrival dynamics, and discriminated mixed populations.
  • Showcased the sensor's robustness against pore clogging, ensuring continuous analysis.

Conclusions:

  • The microfluidic TDMA resistive pulse sensor offers a scalable solution for particle analysis.
  • This technology effectively overcomes limitations of traditional multi-pore systems, particularly clogging.
  • The TDMA approach holds significant potential for advancing multiplexed resistive pulse sensing applications.