Microneedle sensor (IMAGE) California NanoSystems Institute Caption The sensor uses microneedles that are made by cutting down clinical-grade acupuncture needles. Credit Emaminejad Lab/UCLA 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.