M-Mode Image (image) The Optical Society Share Print E-Mail Caption Caption: This image, captured by the UNC team, shows gold nanorods diffusing into a layer of mucus. The speckles in the top part of the image are due to rapid light intensity fluctuations caused by the gold nanorods as they move through the mucus. The black layer underneath is human lung cells, and the lack of green speckle shows that the nanorods have not penetrated the cells. The lines of solid color are the membrane. Credit Amy Oldenburg, et al/UNC Usage Restrictions Include caption & credit 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.