Copper Foil (IMAGE) California Institute of Technology Caption This false-color image, produced with scanning electron microscopy, shows microscopic details on the surface of a copper foil that was used as a catalyst in a chemical reaction studied at Berkeley Lab's Advanced Light Source. The scale bar represents 50 microns, or millionths of a meter. Credit Berkeley Lab Usage Restrictions Please use 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.