Fluorescent Quantum Dots (image) University of Delaware Share Print E-Mail Caption A University of Delaware research team aims to to change the color of light, by developing new nanostructures that act like a ratchet -- combining the energy of two red photons of light into a single blue photon, which has higher energy. Such an advance could improve solar cell efficiency to chemotherapy treatments. Credit Evan Krape/University of Delaware Usage Restrictions Image must include credit to University of Delaware. 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.