Team creates micro-robots propelled by air bubbles and ultrasound

A scanning electron microscope image shows a cell-size robotic swimmer that can be powered and steered by ultrasound waves. Credit: Cornell University

Some engineers find inspiration in the mechanics of bird flight and the architecture of bee nests. Others think much smaller.

A team led by Mingming Wu, professor of biological and environmental engineering in the Cornell University College of Agriculture and Life Sciences, created cell-size robots…

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