Formation of nanoporous Au by dealloying AuCu thin films in HNO3

AuCu thin films were dealloyed in concentrated HNO3 solution at temperatures of 5-35 degree C. X-ray diffraction and scanning electron microscopy analysis showed that interior grain regions undergo partial Cu dissolution before being assimilated into a ligament/void network that was initiated at gra...

Full description

Saved in:
Bibliographic Details
Published in:Scripta materialia 2011-05, Vol.64 (9), p.856-859
Main Authors: Morrish, R., Dorame, K., Muscat, A.J.
Format: Article
Language:English
Subjects:
Alloys
Binary systems
Compressive properties
Copper |m Binary systems
Dissolution
Gold |m Binary systems
Grain boundaries
Ligaments
Nanostructure
Networks
Thin films
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:AuCu thin films were dealloyed in concentrated HNO3 solution at temperatures of 5-35 degree C. X-ray diffraction and scanning electron microscopy analysis showed that interior grain regions undergo partial Cu dissolution before being assimilated into a ligament/void network that was initiated at grain boundaries. The compressive stress generated by removal of the smaller Cu atom yielded an activation energy for ligament growth of 25.4 plus or minus 2.37kJmol super(-1), which is less than half that reported for AgAu alloys.
ISSN:1359-6462
DOI:10.1016/j.scriptamat.2011.01.021