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Updated: Jan 13, 2026

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

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High-Recovery Submicron Particle Detection Enabled by Weakly Deformed Thread Flow.

Yuntao Wang^1,2, Fuping Peng¹, Chenhui Hu²

¹Research Center for Frontier Fundamental Studies, Zhejiang Lab, Hangzhou 311121, China.

Langmuir : the ACS Journal of Surfaces and Colloids

|January 6, 2026

Summary

This summary is machine-generated.

This study introduces a new microfluidic method to improve the recovery of small particles in flow cytometry. The optimized weakly deformed thread flow state enhances particle detection, aiding in microorganism analysis.

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Area of Science:

Microfluidics
Biotechnology
Particle Analysis

Background:

Current flow cytometry methods struggle with high-efficiency recovery of submicrometer particles.
Engineering challenges in kinetic manipulation limit detection of smaller particles.

Purpose of the Study:

To enhance the recovery rate of submicrometer particles in flow cytometry.
To investigate and optimize the weakly deformed thread flow state for improved particle manipulation.

Main Methods:

Utilized finite element method (FEM) to ascertain and optimize parameters for the weakly deformed thread flow state.
Developed a long depth-of-field (DOF) fluorescence microscopy system and signal analysis methodology.
Mapped a detailed weakly diffusive phase diagram.

Main Results:

Achieved a 94.3% recovery rate for 1 μm particles and 85.1% for 0.5 μm particles.
Identified and studied the weakly deformed thread flow state within the weak diffusion regime.

Conclusions:

The developed microfluidic approach significantly improves recovery rates for submicrometer particles.
Potential applications include quantitative detection of microorganisms like E. coli and mycoplasma in water bodies.