Lanthanide Sensor (image) Penn State Share Print E-Mail Caption A new sensor changes its fluorescence when it binds to lanthanides (Ln), rare earth metals used in smartphones and other technologies, potentially providing a more efficient and cost-effective way to detect these elusive metals. Credit Cotruvo Lab, Penn State Usage Restrictions Credit must be provided alongside image. Share Print E-Mail 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.