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Innovation

Ultrasonically propelled nanorods spin at 150,000 rpm!

Vibrate a solution of rod-shaped metal nanoparticles in water with ultrasound and they’ll spin around their long axes like tiny drill bits.
Why? No one yet knows exactly. But researchers at the National Institute of Standards and Technology (NIST) have clocked their speed—and it’s fast. At up to 150,000 revolutions per minute, these nanomotors rotate 10 times faster than any nanoscale object submerged in liquid ever reported.
The discovery of this dizzying rate has opened up the

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