Researchers report a practical realization of holographic acoustic tweezers, in which ultrasonic waves produced by two arrays of 256 sound emitters were used to trap and individually manipulate up to 25 millimeter-sized particles simultaneously in three dimensions; such technology could be used for contact-free small-scale assembly or for the creation of 3D displays consisting of levitating physical voxels.
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Article #18-13047: "Holographic acoustic tweezers," by Asier Marzo and Bruce W. Drinkwater.
MEDIA CONTACT: Asier Marzo, Public University of Navarre, Pamplona, SPAIN; tel: +34-662259371; e-mail: amarzo@hotmail.com
Proceedings of the National Academy of Sciences