Abstract
The selective dissolution of Cu from CuAu 3 alloys has been studied by STM imaging in situ as a function of anodic polarization. The experiments were performed on (111) oriented films grown on mica that exhibit large terraces separated by steps. Dissolution of Cu in the subcritical region produces vacancies that aggregate to form two-dimensional voids in the terraces. The voids are one atom deep and grow in size as a function of dealloying time. Voids are not formed in the exposed second layer. The layer-by-layer removal of material becomes three-dimensional with profuse surface roughening above the critical potential. A model for the dealloying based on these results is proposed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
