Whirlpool Device (IMAGE) Duke University Caption The new acoustic whirlpool device with a penny for scale. The acoustic transducer creates a whirlpool in the long, thing, blue capillary tube that effectively concentrates nanoparticles. Credit Duke University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.