Microscopic Sonic Screwdriver Invented

A team of engineers have created tiny acoustic vortices and used them to grip and spin microscopic particles suspended in water. The research by academics from the University of Bristol's Department of Mechanical Engineering and Northwestern Polytechnical University in China, is published in Physical Review Letters. The researchers have shown that acoustic vortices act like tornados of sound, causing microparticles to rotate and drawing them to the vortex core. Like a tornado, what happens to the particles depends strongly on their size. read more

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