Electron Density Oscillations (IMAGE) Forschungszentrum Juelich Caption Electron density oscillations on the surface of a metallic film were made visible with the help of low temperature scanning tunneling microscopy. Credit Forschungszentrum Jülich Usage Restrictions Image may only be used with appropriate credit. 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.