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Updated: Apr 19, 2026

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

Multi-particle trapping and manipulation by a high-frequency array transducer.

Changhan Yoon¹, Bong Jin Kang¹, Changyang Lee¹

¹NIH Resource Center for Medical Ultrasonic Transducer Technology and Department of Biomedical Engineering, University of Southern California , Los Angeles, California 90089, USA.

Applied Physics Letters

|December 10, 2014

Summary

This summary is machine-generated.

This study demonstrates trapping and manipulating multiple micro-particles using a single acoustic beam. The technique offers precise control over particle spacing for applications in cell biology and biosensors.

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Area of Science:

Acoustic manipulation
Microfluidics
Biotechnology

Background:

Acoustic tweezers offer non-contact manipulation of micro-particles.
Controlling multiple particles simultaneously presents a significant challenge.

Purpose of the Study:

To develop a method for trapping and manipulating multiple micro-particles using a single acoustic beam.
To investigate the control over inter-particle distances.

Main Methods:

Utilized a single-beam acoustic tweezer with a 30 MHz ultrasonic linear array transducer.
Generated acoustic beams to trap particles in main and grating lobes.
Adjusted particle spacing by altering transducer transmit arrangements.

Main Results:

Successfully trapped and manipulated multiple micro-particles within a hundreds-of-micrometers range.
Demonstrated adjustable distances between trapped particles.
Achieved manipulation using low acoustic power, minimizing potential cell damage.

Conclusions:

The single-beam acoustic tweezer technique enables efficient multi-particle manipulation.
This method shows promise for cell transportation in cell biology, biosensors, and tissue engineering.
The low-power, non-contact nature is ideal for delicate biological samples.