Photo of Researchers in Lab (IMAGE) Fred Hutchinson Cancer Research Center Caption Drs. Jen Adair (left) and Reza Shahbazi examine a test batch of gold nanoparticles at their lab at Fred Hutch. The solution is red because when gold ions clump together to form nanoparticles, electrons on the surface start oscillating and reflecting the light in different wavelengths. Then when light strikes the gold particles, electrons reflect the light differently. Credit Robert Hood | Fred Hutch News Service Usage Restrictions with credit 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.