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Standing surface acoustic wave (SSAW)-based microfluidic cytometer.

Yuchao Chen1, Ahmad Ahsan Nawaz, Yanhui Zhao

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

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|January 11, 2014
PubMed
Summary
This summary is machine-generated.

This study presents a sheathless microfluidic cytometer using standing surface acoustic waves (SSAW) for 3D cell focusing. The system offers a low-cost, compact, and simple solution for flow cytometry, preserving cell integrity.

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Microfluidics

Background:

  • Microfluidic chip-based cytometers offer advantages in size and cost.
  • Traditional flow cytometry often requires sheath fluid and complex setups.
  • Developing sheathless systems is crucial for simplified and portable cytometers.

Purpose of the Study:

  • To demonstrate a sheathless microfluidic cytometer integrating standing surface acoustic wave (SSAW) technology for 3D particle/cell focusing.
  • To evaluate the performance of the SSAW-based system for flow cytometry applications.
  • To highlight the advantages of SSAW in terms of simplicity, cost, and cell preservation.

Main Methods:

  • Integration of a SSAW microdevice for 3D particle/cell focusing within a microchannel.
  • Utilizing a laser-induced fluorescence (LIF) detection system.
  • Demonstration of flow cytometry with calibration beads and fluorescently labeled HL-60 cells.

Main Results:

  • Continuous 3D focusing of microparticles/cells at the SSAW pressure node.
  • Achieved flow cytometry with a coefficient of variation (CV) < 10% at ~1000 events/s using calibration beads.
  • Successful focusing and detection of fluorescently labeled HL-60 cells.

Conclusions:

  • The SSAW-based microfluidic cytometer provides sheathless, simple operation over a wide flow rate range.
  • The system demonstrates high performance (CV < 10%) and throughput (~1000 events/s).
  • The gentle, bio-compatible SSAW technique preserves cell integrity, making it suitable for bioparticle analysis.