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Effects of two surface acoustic wave sorting chips on particles multi-level sorting.

Guojun Liu1, Fang He1, Yan Li2

  • 1College of Mechanical and Aerospace Engineering, Jilin University, Changchun, 130025, China.

Biomedical Microdevices
|June 23, 2019
PubMed
Summary

This study introduces microfluidic sorting chips that use hydraulic and acoustic forces for continuous multi-particle separation. The sequential sorting chip demonstrated superior performance for medical and chemical analysis applications.

Keywords:
Acoustic radiation forceHydraulic forceMicrofluidic chipMulti-level separationSurface acoustic wave

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Area of Science:

  • Microfluidics
  • Acoustic Technology
  • Particle Separation

Background:

  • Particle and cell sorting are crucial for medical diagnostics and chemical analysis.
  • Existing methods may lack efficiency or the ability to handle multiple particle types simultaneously.

Purpose of the Study:

  • To design and evaluate microfluidic sorting chips for continuous multi-particle separation.
  • To optimize chip parameters for enhanced sorting efficiency and purity.

Main Methods:

  • Designed two microfluidic chips: sequential and direct sorting.
  • Combined hydraulic and acoustic radiation forces for particle manipulation.
  • Optimized parameters including angle (α), voltage (Vpp), flow velocity (Vmax), and flow ratio (A) through simulation and experimentation.
  • Conducted sorting experiments using polystyrene particles of varying sizes (1, 5, and 10 μm).

Main Results:

  • Identified optimal parameters: α=15°, Vpp=25 V, Vmax=4 mm/s, A1=0.2, A2=0.5.
  • Both chip designs achieved continuous multi-particle sorting.
  • The sequential sorting chip exhibited better sorting efficiency and purity compared to the direct sorting chip.
  • Successfully sorted polystyrene particles of 1 μm, 5 μm, and 10 μm diameters.

Conclusions:

  • Microfluidic sorting chips utilizing combined hydraulic and acoustic forces are effective for continuous multi-particle separation.
  • The sequential design offers advantages in sorting performance.
  • These chips present a simple, efficient solution for applications in medical diagnosis and chemical analysis, including cell sorting.