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Micro-Acoustic-Trap (µAT) for microparticle assembly in 3D
Varun Vyas1, Michael Lemieux2, David A Knecht2
1Materials Science and Engineering Department, University of Connecticut, Storrs, CT 06269, United States.
Ultrasonics Sonochemistry
|June 19, 2019
Summary
This study introduces a 3D micro-acoustic trap using an acoustic lens to precisely assemble microparticles with sound waves. The system successfully arranged 2µm beads and live amoebae, advancing acoustic manipulation capabilities.
Area of Science:
- Physics
- Biotechnology
- Materials Science
Background:
- Acoustic tweezers traditionally offer limited control over microparticle manipulation.
- Precise 3D assembly of microscale objects remains a significant challenge in various scientific fields.
Purpose of the Study:
- To develop a novel Micro-Acoustic Trap capable of 3D microparticle assembly.
- To demonstrate the system's efficacy using model particles and biological cells.
Main Methods:
- Utilized an Acoustic Lens to create a focused acoustic field for trapping.
- Employed acoustic radiation pressure at 89 MHz with pulsed excitation to manipulate 2µm polystyrene beads.
- Investigated the assembly of microparticles into monolayers and rafts.
Main Results:
- Achieved 2D assembly of microparticles into close-packed rafts exceeding 80 µm across.
- Demonstrated successful manipulation of live Dictyostelium discoideum amoebae.
- Established a threshold drive amplitude necessary to overcome Brownian motion for particle assembly.
Conclusions:
- The developed Micro-Acoustic Trap offers advanced maneuverability for assembling micrometer-scale objects.
- This technique shows potential for applications in 3D microparticle assembly and biological cell manipulation.
- Focused acoustic radiation pressure provides a versatile tool for controlling microscale systems.
Keywords:
2D microparticle ArrayAcoustic LensAcoustic TrapAcoustic TweezersAcoustofluidicsDictyostelium discoideum (Amoebae)More Related Videos
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