Dual-function Microbeads (IMAGE) Georgia Institute of Technology Caption Tushar Sathe holds a vial of dual-function beads embedded with iron oxide and 600 nanometer emission quantum dots while Shuming Nie looks on. The other vials contain beads embedded with quantum dots that emit light at other wavelengths. Credit Georgia Tech Photo: Gary Meek 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.