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    Sound-Induced Electric Fields Control the Tiniest Particles

    June 25, 2021, Categories  Physics, Technology/Electronics

    This new biomedical device manipulates particles as small as DNA (2.5 nanometers) with sound-induced electric fields. Four transducers send sound waves into a substrate that creates electricity as it vibrates, producing patterns of electric-acoustic waves that control particles in the liquid-filled chamber above.

    Acoustoelectronic tweezers gently manipulate biological nanoparticles just a few nanometers wide. Engineers at Duke University have devised a system for manipulating particles approaching the miniscule 2.5 nanometer diameter of DNA using sound-induced electric fields. Dubbed “acoustoelectronic nanotweezers,” the approach provides a label-free, dynamically controllable method of moving and trapping nanoparticles over a large area...

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