Acoustic Levitation
Acoustic Levitation - Related Videos
08:19
Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
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Cited by 2 •
2021
A fast and reliable technique is proposed to control the shape oscillations of a single, trapped acoustic bubble that is based on coalescence technique between two bubbles. The steady-state, symmetry-controlled bubble shape oscillations allow analysis of the fluid flow generated in the vicinity of the bubble interface.
07:42
Magnetic Levitation Coupled with Portable Imaging and Analysis for Disease Diagnostics
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Cited by 11 •
2017
We present a magnetic levitation technique coupled with automated imaging and analysis in both a smartphone-compatible device and a device with embedded imaging and processing. This is applied to measure the density distribution of cells with two demonstrated biomedical applications: sickle cell disease diagnosis and separating white and red blood cells.
04:10
Detection of Rhesus Factor in Human Blood Samples using Magnetic Levitation
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2025
This video demonstrates the detection of the Rhesus (Rh) factor in blood samples using a magnetic levitation instrument. The magnetic field aligns and levitates beads and blood cells based on density. Treating the samples with anti-Rh antibodies results in intermediate-density bead-cell complexes' formation, allowing for the differentiation of Rh-positive and Rh-negative red blood cells.
12:26
Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
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Cited by 4 •
2013
In this video we first describe fabrication and operation procedures of a surface acoustic wave (SAW) acoustic counterflow device. We then demonstrate an experimental setup that allows for both qualitative flow visualization and quantitative analysis of complex flows within the SAW pumping device.
14:22
Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation
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Cited by 6 •
2014
Acoustic cavitation in liquids submitted to power ultrasound creates transient extreme conditions inside the collapsing bubbles, which are the origin of unusual chemical reactivity and light emission, known as sonoluminescence. In the presence of noble gases, nonequilibrium plasma is formed. The "hot" particles and the photons generated by collapsing bubbles are able to excite species in solution.
FAQs
The key mechanism is the balance between acoustic radiation force and gravity. A standing-wave field creates repeating regions of pressure, and particles, droplets, or small components can remain near selected pressure nodes when the upward or positioning effect of the sound field offsets their weight. This balance gives engineers a way to hold samples in defined locations without physical supports.
Pressure nodes act as preferred locations within the standing-wave field, allowing suspended material to occupy controlled positions rather than move freely through space. Positioning near these nodes supports the handling and study of particles, droplets, and small components. In engineering systems, that spatial control is important for precision operations where contact could disturb a sample or introduce unwanted material.
Acoustic Levitation removes the direct mechanical contact used by conventional tools. This reduces the likelihood that friction or contact surfaces will interfere with a sample, which is especially valuable for contamination-free handling. The noncontact approach therefore suits engineering tasks involving sensitive processing, laboratory automation, and measurements where physical tools could affect the material or the observation.
An engineering workflow begins by establishing a standing-wave field, then placing particles, droplets, or small components within the field so acoustic radiation force can counteract gravity. The object is positioned near a pressure node and manipulated or studied while suspended. This sequence supports controlled, contactless handling and can be adapted to material processing, sample handling, or precision assembly.
The method is useful when engineers need to process or move material without introducing friction or contamination. Supported applications include material processing, microfluidics, biological sample handling, precision assembly, laboratory automation, and contactless measurement. Across these areas, suspension in midair enables controlled access to the sample while avoiding the physical constraints imposed by conventional handling tools.
The approach can position particles, droplets, and small components within the acoustic field. That range connects the technique to both laboratory-scale sample work and engineering operations involving small parts. By keeping these objects suspended near pressure nodes, engineers can manipulate or study them in midair, supporting research and development in processing, assembly, microfluidics, and biological handling.