Luminescent Nanocrystals (image) DOE/Lawrence Berkeley National Laboratory Share Print E-Mail Caption This shows the luminescence of CdSe/CuS nanocrystals prepared by cation-exchange. On the left are crystals prior to purification, on the right are the same nanocrystals after impurities have been removed. Credit Courtesy of Berkeley Lab Usage Restrictions None 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.