Polymer Membrane and Nanochannels (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Image (a) is an AFM image of a polymer membrane whose dark core corresponds to organic nanotubes. (b) is a TEM showing a sub-channeled membrane with the organic nanotubes circled in red. Inset shows zoomed-in image of a single nanotube. Credit Image from Ting Xu 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.