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  • RESEARCH HIGHLIGHT

A pair of whirlpools delicately move an embryo — contact-free

A droplet of water with blue dye is floating on the FC 70 oil thanks to the upright piezoelectric (PZT) plate underneath it.

A bright-blue water droplet is gently held in place by vortices, which are generated by the upright plates of an acoustic ‘tweezer’ set-up. Credit: Haodong Zhu/Duke University

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Nature 589, 333 (2021)

doi: https://doi.org/10.1038/d41586-021-00059-2

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