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Related Experiment Video

Updated: Jun 7, 2026

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
06:51

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Published on: August 21, 2018

Manipulation of microparticles using phase-controllable ultrasonic standing waves.

C R P Courtney, C-K Ong, B W Drinkwater

    The Journal of the Acoustical Society of America
    |October 26, 2010
    PubMed
    Summary

    Researchers demonstrate a novel ultrasound method for precisely manipulating microparticles in liquids. This technique uses acoustic radiation force to trap and move 5 μm particles controllably, paving the way for advanced microfluidic applications.

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    Synthesis of Phase-shift Nanoemulsions with Narrow Size Distributions for Acoustic Droplet Vaporization and Bubble-enhanced Ultrasound-mediated Ablation

    Published on: September 13, 2012

    Area of Science:

    • Acoustics
    • Microfluidics
    • Biophysics

    Background:

    • Traditional microparticle manipulation methods often lack precision or require complex setups.
    • Controlling microparticle positions is crucial for applications in drug delivery, diagnostics, and cell sorting.

    Discussion:

    • This study introduces a method using ultrasonic standing waves to manipulate microparticles.
    • The system utilizes two piezoelectric transducers to generate controllable nodal planes by adjusting signal phase.
    • Acoustic radiation force enables precise trapping and movement of micron-scale particles.

    Key Insights:

    • Arbitrary positioning of microparticles is achieved by controlling the relative phase of applied sinusoidal signals.
    • Experimental validation shows successful manipulation of 5 μm polystyrene particles over a 140 μm distance.
    • The method offers a non-invasive and precise approach to microparticle handling.

    Outlook:

    • Potential applications in lab-on-a-chip devices and targeted therapies.
    • Further research could explore 3D manipulation and integration with other microfluidic techniques.
    • This technique may enable new possibilities in fundamental research involving microscale systems.