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Updated: Jun 6, 2025
06:51
Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
Published on: August 21, 2018
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Airborne Acoustic Vortex End Effector-based Contactless, Multi-mode, Programmable Control of Object Surfing.
1Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24060, USA.
Advanced Materials Technologies
|November 27, 2024
Summary
This study introduces novel acoustic vortex tweezers for precise, contactless manipulation of millimeter-sized objects. The system enables programmable control for trapping, spinning, and complex path translation of particles and droplets.
Area of Science:
- Physics
- Engineering
- Biotechnology
Background:
- Contactless manipulation technologies like optical, electric, magnetic, and acoustic tweezers show promise.
- Existing tweezers for millimeter-sized objects have limitations in resolution, range, and path complexity.
Purpose of the Study:
- To develop a novel acoustic vortex tweezers system for advanced contactless manipulation of millimeter-sized objects.
- To overcome limitations in translation resolution, range, and path complexity of current manipulation systems.
Main Methods:
- Integration of a portable, battery-powered acoustic vortex end effector with a three degree-of-freedom (DoF) linear motion stage.
- Generation of an airborne acoustic vortex using a cascaded circular acoustic array to create a ring-shaped energy pattern.
- Utilizing acoustic radiation forces for trapping, spinning, and repelling objects.
Main Results:
- Demonstrated contactless, multi-mode, programmable manipulation of particles and droplets.
- Successfully trapped, repelled, and spun particles.
- Translated particles along complex paths, guided them around barriers, and manipulated droplets containing zebrafish larvae, including merging droplets.
Conclusions:
- The developed acoustic vortex tweezers system offers advanced capabilities for contactless, programmable object handling.
- This technology is anticipated to be valuable for automated handling of droplets, particles, and bio-samples in research.
- The system's ability to protect trapped objects by repelling other materials enhances its utility.
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