SEM Micrograph (IMAGE) American Institute of Physics Caption This SEM micrograph shows the nanostructured ZnO layer, Swiss cheese design for Micromorph solar cells. Credit Milan Vanecek, Institute of Physics, Prague 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.