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Standing surface acoustic wave (SSAW)-based cell washing.

Sixing Li1, Xiaoyun Ding, Zhangming Mao

  • 1Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA. junhuang@psu.edu.

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Summary

This study introduces a novel microfluidic device using standing surface acoustic waves (SSAW) for efficient cell and bead washing. The device achieves high purity and recovery rates for biological samples in continuous flow.

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Area of Science:

  • Biotechnology
  • Microfluidics
  • Acoustic manipulation

Background:

  • Cell and bead washing is crucial for sample preparation in cell studies and analysis.
  • Existing methods can be time-consuming or inefficient.

Purpose of the Study:

  • To develop a microfluidic device for efficient cell and bead washing using standing surface acoustic waves (SSAW).
  • To demonstrate high recovery and washing efficiency for biological samples.

Main Methods:

  • Utilized acoustic radiation force generated by a tilted-angle standing surface acoustic wave (taSSAW) field.
  • Developed a continuous flow microfluidic device for active extraction of cells/beads.

Main Results:

  • Achieved >98% recovery rate and >97% washing efficiency for beads.
  • Demonstrated preparation of high-purity (>97%) white blood cells from lysed blood samples.

Conclusions:

  • The SSAW-based microfluidic device offers label-free, simple, and highly efficient cell/bead washing.
  • This technology has potential applications in lab-on-a-chip systems and various cell analysis workflows.