Cadmium Selenide Nanocrystals (IMAGE) University of Rochester Caption Cadmium selenide nanocrystals absorb light and transfer electrons to a nickel catalyst (blue), which subsequently generates hydrogen (white). Credit Ted Pawlicki/University of Rochester 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.