An Inkjet-Printed Wearable Sweat Sensor (IMAGE) California Institute of Technology Caption A researcher holds one of Caltech's printed, wearable sweat sensors based on the core–shell nanoparticle technology developed in Wei Gao's lab. Credit Caltech Usage Restrictions none License Original 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.