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Related Experiment Video

Updated: May 21, 2026

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

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

Published on: August 21, 2018

Manipulating particle trajectories with phase-control in surface acoustic wave microfluidics.

Nathan D Orloff, Jaclyn R Dennis, Marco Cecchini

    Biomicrofluidics
    |June 5, 2012
    PubMed
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    This study introduces a 91 MHz surface acoustic wave resonator with microfluidics to manipulate particle trajectories. The device precisely controls bead streams by adjusting acoustic node positions, enabling targeted particle sorting.

    Area of Science:

    • Acoustic-microfluidic devices
    • Surface acoustic wave resonators
    • Particle manipulation technology

    Background:

    • Acoustic manipulation offers label-free particle handling.
    • Integrated microfluidic systems are crucial for lab-on-a-chip applications.
    • Precise control over particle trajectories is essential for separation and sorting.

    Purpose of the Study:

    • To develop and demonstrate a 91 MHz surface acoustic wave resonator with integrated microfluidics.
    • To investigate the manipulation of particle trajectories using acoustic forces.
    • To achieve precise spatial and angular control over multiple particle streams.

    Main Methods:

    • Fabrication of a 91 MHz surface acoustic wave resonator with integrated microfluidic channels (flow focus, expansion, binning regions).

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    Published on: August 21, 2018

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  • Manipulation of acoustic node positions by varying the electronic phase between transducers.
  • Real-time tracking and analysis of 3 µm latex bead trajectories in a water-based solution at room temperature.

    • Main Results:

    • Demonstrated pseudo-static control of acoustic node positions via transducer phase adjustment.
    • Achieved simultaneous control of 9 bead streams with precise spatial control (-0.058 µm/deg ± 0.001 µm/deg).
    • Showcased trajectory control of bead streams towards a selected bin with angular control (0.008 deg/deg ± 0.0002 deg/deg).

    Conclusions:

    • The integrated acoustic-microfluidic device effectively manipulates particle trajectories.
    • Phase-controlled acoustic nodes provide a robust method for precise particle stream steering.
    • This technology holds promise for advanced particle sorting and analysis in microfluidic systems.