Nanoparticle Megalibrary (IMAGE) Penn State Caption A simple, modular chemical approach could produce over 65,000 different types of complex nanorods. Electron microscope images are shown for 32 of these nanorods, which form with various combinations of materials. Each color represents a different material. Credit Schaak Laboratory, Penn State 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.