Nano-propellers sent for a spin
`Metallic rods about 500 times smaller than the width of a human hair have been turned into tiny “propellers” by a Canadian research team. [..]
Their motion is driven by addition of hydrogen peroxide (H2O2) to the solution in which they are contained.
A reaction at the free ends liberates gas bubbles to provide thrust, turning the rods at a near constant speed.’
