Copper Atoms (IMAGE) Stanford University Caption Atoms on the surface of copper (751) are relatively far apart compared to other copper crystals. That could explain why copper (751) is far more selective to producing ethanol when exposed to carbon dioxide. Credit Illustration:?Christopher?Hahn/SLAC?National?Accelerator?Laboratory Usage Restrictions Graphics, photographs and videos provided by the Precourt Institute for Energy at Stanford University are to be used - with appropriate credit - for editorial purposes only. Flopping, altering, editing or otherwise embellishing these images and audio clips in any way that changes the editorial content of these images and audio clips is prohibited. Permission is for one-time use only. Supplied image file must be deleted after use. 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.