Remotely Controlled Nanomachines (image) American Physical Society Caption Adding legs to molecules of azobenzene adhered to a gold surface allows them to change shape when illuminated with a UV laser. Credit M. J. Comstock et al. Physical Review Letters Usage Restrictions Contact the authors or the American Physical Society for permission to reproduce this image. 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.