“Acoustic Tweezers” Manipulate Microscopic Organisms With Sound Waves
The device creates standing surface acoustic waves, or SAWs. The material that scientists want to manipulate is placed in a liquid medium and the SAWs create a pressure field in it. The SAWs are then tuned to either hold or move the material. Penn State University researchers, for the first time, used the technology to manipulate Caenorhabditis elegans, a 1-mm-long roundworm used for studying diseases and development in humans.
(via “Acoustic Tweezers” Can Manipulate Tiny Organisms Using Sound Waves | Popular Science)