Abstract
A selective dealloying in bimetallic nanoclusters prepared by ion implantation has been found upon thermal annealing in oxidizing atmosphere or irradiation with light ions. In the first process, the incoming oxygen interacts preferentially with copper promoting formation, therefore extracting copper from the alloy. In the second process the irradiation with Ne ions promotes a preferential extraction of Au from the alloy, resulting in the formation of Au-enriched “satellite” nanoparticles around the original cluster.
- Received 28 July 2002
DOI:https://doi.org/10.1103/PhysRevLett.90.085502
©2003 American Physical Society