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Atomic Force Microscopy

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Related Experiment Video

Updated: May 13, 2026

Fabrication and Operation of Acoustofluidic Devices Supporting Bulk Acoustic Standing Waves for Sheathless Focusing of Particles

Fabrication and Operation of Acoustofluidic Devices Supporting Bulk Acoustic Standing Waves for Sheathless Focusing of Particles

Published on: March 6, 2016

Acoustic black hole effect enhanced micro-manipulator.

Qiu Yin^1,2, Haoyong Song³, Zhaolong Wang⁴

¹State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, China.

Microsystems & Nanoengineering

|October 11, 2024

Summary

Acoustic black hole (ABH) effect enhances microparticle manipulation. ABH microneedles concentrate acoustic energy for superior control in microfabrication and biomedicine.

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Last Updated: May 13, 2026

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Area of Science:

Acoustofluidics
Microfluidics
Materials Science

Background:

Microparticle manipulation is crucial for microfabrication, flexible electronics, and tissue engineering.
Acoustic-activated sharp structures offer a simple, tunable method for microparticle manipulation.
Existing designs lack rational acoustic-structure optimization for energy concentration.

Purpose of the Study:

To enhance acoustic micro-manipulators using the acoustic black hole (ABH) effect.
To investigate the ABH effect's capability for effective energy concentration at sharp structures.
To demonstrate custom design of high-throughput patterning modes for microparticle manipulation.

Main Methods:

Integration of the acoustic black hole (ABH) effect into microneedle designs.
Comparative analysis of ABH microneedles against cylindrical and conical microneedles.
Experimental investigation of parameters influencing performance: frequency, voltage, and particle diameter.

Main Results:

ABH microneedles exhibit superior acoustic energy focusing compared to conventional designs.
Acoustic flow velocity increased by 154x (vs. conical) and 45x (vs. cylindrical).
Acoustic radiation force (ARF) increased by 319x (vs. cylindrical) and 16x (vs. conical).

Conclusions:

The ABH design significantly enhances microparticle manipulation capabilities.
The developed system offers reliability, simplicity, and ease of use.
This technology holds potential for advanced microfabrication and biomedical applications.