Figure 1: Unique Christmas-tree-shaped palladium nanostructures. (IMAGE) Japan Advanced Institute of Science and Technology Caption Figure 1: Unique Christmas-tree-shaped palladium nanostructures. Credit JAIST 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.