Lateral cavity acoustic transducer as an on-chip cell/particle microfluidic switch
Maulik V Patel1, Armando R Tovar, Abraham P Lee
1Department of Biomedical Engineering, University of California at Irvine, Irvine, CA 92697, USA.
Lab on a Chip
|November 11, 2011
Summary
A new microfluidic switch uses acoustic microstreaming to precisely direct cells and particles. This technology achieves high throughput and maintains cell viability, offering a promising tool for cell sorting applications.
Area of Science:
- Microfluidics
- Acoustic manipulation
- Biotechnology
Background:
- Microfluidic devices are crucial for cell manipulation.
- Efficient and precise cell/particle switching is a key challenge in microfluidics.
- Existing methods may lack throughput or compromise cell viability.
Purpose of the Study:
- To demonstrate a novel on-chip microfluidic switch.
- To utilize acoustic microstreaming for cell/particle deflection.
- To evaluate the performance and cell viability of the developed switch.
Main Methods:
- Development of a microfluidic switch utilizing Lateral Cavity Acoustic Transducers (LCATs).
- Actuation of an air-liquid interface to generate acoustic microstreaming.
- Deflection of cells/particles into bifurcating microchannels using microstreaming flow.
- Assessment of switching efficiency and cell viability using Trypan blue exclusion assay.
Main Results:
- The LCAT-based microfluidic switch successfully deflected cells/particles.
- Switching efficiency was controllable by adjusting actuation time.
- Theoretical switching rates reached 800 cells/particles per second.
- K562 cell switching maintained viability comparable to controls.
Conclusions:
- A novel, efficient microfluidic switch based on acoustic microstreaming was successfully demonstrated.
- The device offers high throughput and preserves cell viability.
- This technology presents a significant advancement for cell sorting and manipulation in microfluidic systems.
