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Related Experiment Video

Updated: Jun 25, 2025

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
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High-Throughput Microfluidic Particle Counter Based on Optical Absorption.

Qingyue Xian1,2, Xiao Luo3, Jie Zhang1

  • 1Thrust of Advanced Materials, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou 511400, China.

ACS Biomaterials Science & Engineering
|May 23, 2024
PubMed
Summary

This study introduces a microfluidic particle counter using optical absorption for efficient and precise cell detection. The device shows high reliability and agreement with traditional methods, promising for point-of-care diagnostics.

Keywords:
counterhigh-throughputmicrofluidicparticleprecisesystem

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry

Background:

  • Microfluidic devices offer high efficiency, precision, and portability for particle analysis.
  • Accurate particle counting is crucial for various diagnostic and research applications.
  • Existing methods may lack the throughput or portability required for real-time testing.

Purpose of the Study:

  • To develop and validate a novel microfluidic particle counter utilizing optical absorption.
  • To enhance particle detection accuracy through a unique Christmas tree-like structure for single-particle isolation.
  • To assess the system's reliability and performance against established techniques like flow cytometry.

Main Methods:

  • Implementation of a microfluidic chip with a Christmas tree-like structure for particle separation.
  • Photodetection based on optical absorption for counting individual particles.
  • Validation using gradient-concentrated beads and NIH 3T3 cell density measurements.

Main Results:

  • Demonstrated high reliability with a linear correlation coefficient > 0.99 for bead counting.
  • Achieved substantial agreement (87.5% to 99.9%) with flow cytometry for cell density.
  • The system supports high-throughput analysis with a high acquisition rate.

Conclusions:

  • The developed microfluidic particle counter offers a reliable and efficient method for particle analysis.
  • Its precision and portability make it suitable for high-throughput applications.
  • The system shows significant potential for real-time point-of-care testing.