Photo of Vials Containing Nanoparticles (IMAGE) Fred Hutchinson Cancer Research Center Caption As gold ions clump together to form nanoparticles, electrons on their surface reflect light at a different wavelength -- hence the red hue. The lab tube in the foreground contains gold ions before they form nanoparticles and loaded with gene editing tools. 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.