Local Enhanced Microstreaming for Controllable High-Speed Acoustic Rotary Microsystems

Acoustically driven micro- and nanomachines seem promising, by virtue of their simplicity and universality, but effective methods to realize controllable high-speed rotation at these length scales are still lacking. This study investigates an actuation mechanism based on local enhanced microstreaming in a low-frequency acoustic field, and proposes a high-speed acoustic rotary microsystem. Using this simple, controllable methodology, a polystyrene rotor 10 $\ensuremath{\mu}$m in diameter can be spun at 5000 rpm, which should be useful in lab-on-a-chip applications.