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Related Experiment Video

Updated: Jan 23, 2026

Optical Trap Loading of Dielectric Microparticles In Air

Optical Trap Loading of Dielectric Microparticles In Air

Published on: February 5, 2017

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.

Keywords:

2D microparticle Array Acoustic Lens Acoustic Trap Acoustic Tweezers Acoustofluidics Dictyostelium discoideum (Amoebae)

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Last Updated: Jan 23, 2026

Optical Trap Loading of Dielectric Microparticles In Air

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Published on: February 5, 2017

Author Spotlight: Development of a Scaffold-Free Acoustic Assembly Method for High-Quality 3D Cell Spheroid Culture

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Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Published on: August 21, 2018

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.