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Related Experiment Video

Updated: Apr 16, 2026

A Microfluidic-based Hydrodynamic Trap for Single Particles

A Microfluidic-based Hydrodynamic Trap for Single Particles

Published on: January 21, 2011

Feasibility of multiple micro-particle trapping--a simulation study.

Yanyan Yu¹, Weibao Qiu², Bernard Chiu³

¹Department of Electronic Engineering, City University of Hong Kong, Hong Kong, China. yanyanyu2-c@my.cityu.edu.

Sensors (Basel, Switzerland)

|March 4, 2015

Summary

This summary is machine-generated.

Acoustic tweezers offer advantages over optical tweezers for trapping micro-particles in biological science. This study demonstrates a method for simultaneous multi-particle trapping using acoustic fields, enabling real-time electronic control.

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Area of Science:

Biomedical Engineering
Acoustic Physics
Microfluidics

Background:

Optical tweezers are widely used for particle manipulation but have limitations in opaque media.
Acoustic tweezers offer advantages like deeper penetration and lower intensity, making them suitable for biological applications.
Simultaneous trapping of multiple particles is increasingly required in advanced applications.

Purpose of the Study:

To propose and demonstrate a method for creating multiple acoustic trapping patterns for micro-particles.
To investigate the real-time electronic control of particle location and movement using acoustic tweezers.
To analyze the forces and trajectories involved in acoustic trapping.

Main Methods:

Generating a multiple-focus acoustic field by controlling phased array transducer elements.
Modeling the acoustic field to determine pressure and intensity distributions.
Evaluating scattering and gradient forces, and computing axial/lateral radiation forces and trapping trajectories using a ray acoustic approach.

Main Results:

Demonstrated the feasibility of creating multiple trapping patterns for micro-particles.
Showcased the potential for real-time electronic control over particle manipulation.
Confirmed that acoustic tweezers can achieve simultaneous multi-particle trapping in both axial and lateral directions.

Conclusions:

The proposed method enables versatile multi-particle trapping using acoustic tweezers.
Acoustic tweezers show significant potential for advanced biological and microfluidic applications requiring precise particle manipulation.