AcousticLevitationAchievesPrecisionManipulationofMicroscopicObjectsinAir

Scientists at the University of Bristol have developed a novel acoustic levitation system capable of precisely manipulating multiple microscopic objects in three dimensions without physical contact. The device uses an array of tiny ultrasonic transducers to generate complex sound fields, allowing individual particles from tens of micrometers to a few millimeters in size to be moved and rotated with unprecedented control. This breakthrough enables the creation of intricate, self-assembling structures or the non-invasive handling of delicate biological samples. Their methodology involves phase-controlled ultrasonic waves, creating 'acoustic tweezers' that can individually grip and maneuver tiny objects with sub-millimeter precision. This technology offers a paradigm shift for handling materials that are sensitive to contamination or physical forces, a significant counter-intuitive application of sound.