Purdue University Heart Monitor (IMAGE) Purdue University Caption A team from Purdue University developed self-powered wearable triboelectric nanogenerators with polyvinyl alcohol-based contact layers for monitoring cardiovascular health. Credit Wenzhuo Wu/Purdue 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.