Twin Nanoparticle (IMAGE) Brown University Caption A unique, dumbbell-shaped twin nanoparticle created by Brown University chemists targets a class of breast cancer cells known as Her-2 tumor cells. Credit Chenjie Xu, Shouheng Sun/Brown 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.