Gold Surfaces (IMAGE) Spanish National Research Council (CSIC) Caption Gold surfaces joint by three units of porphyrin. Credit Centro de Investigación en Nanomateriales y Nanotecnología 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.