Nanoparticles Before and After (IMAGE) Washington State University Caption Coated nanoparticles under a microscope before they react with the spoiled milk gasses (top), with the same nanoparticles after 'smelling' the spoiled milk below. Credit WSU 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.