Silver Clusters (IMAGE) University of California - Santa Barbara Caption Left: The docker (green) is appended to one of the strands that forms the nanotube; right: linkers and dockers are spaced 7 nm apart. Credit UCSB 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.