X-ray of single iron atom (IMAGE) DOE/Argonne National Laboratory Caption Left: Image of a ring-shaped molecular host that contains just one iron atom. Right: X-ray absorption spectrum of single atom detected at location B in the molecular ring. Spectrum matches that of iron. Credit (Image by Argonne National Laboratory.) 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.