Improved Characterization of Nanoparticle Clusters for EHS and Biosensors Research (image) National Institute of Standards and Technology (NIST) Share Print E-Mail Caption Clusters of roughly 30-nanometer gold nanoparticles imaged by transmission electron microscopy. (Color added for clarity.) Credit Keene, FDA Usage Restrictions None Share Print E-Mail 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.