2. RE rotation_2_16x9 (IMAGE) DOE/Argonne National Laboratory Caption Controlled rotation of Eu complex on gold sheet initiated by electrical energy from STM tip, top left. Europium complex before and after rotation by 120 degrees (b,c). Dashed circle indicates negatively charged molecule. Credit (Image by Argonne National Laboratory.) Usage Restrictions Original content License Original 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.