Nanoparticles in Water (IMAGE) Duke University Caption Duke researchers developed a hyperspectral imaging technique to help them visualize and survey nanoparticles in water samples. Shown here are specially coated silver nanoparticles floating in mesocosm water. The average diameter of the nanoparticles is 55 nanometers, or 55 billionths of a meter, but variations in size cause them to reflect different colors as shown in the image. Credit Appala Raju Badireddy Usage Restrictions Please Credit: CEINT, Duke University 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.