Nanostar Spectra (IMAGE) Rice University Caption Scientists use optical microscopes to record the spectra of nanostars. Slight variations in the shape of the spikes results in a signature color for each. Credit Jason Hafner/Rice 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.