Abstract
We report a simple two-step dealloying method for producing bulk nanoporous gold with no volume change and no significant cracking. The galvanostatic dealloying method used here appears superior to potentiostatic methods for fabricating millimeter-scale samples. Care must be taken when imaging the nanoscale, interconnected sponge-like structure with a focused ion beam, as even brief exposure caused immediate and extensive cracking of nanoporous gold, as well as ligament coarsening at the surface.
| Original language | English |
|---|---|
| Pages (from-to) | 727-730 |
| Number of pages | 4 |
| Journal | Scripta Materialia |
| Volume | 58 |
| Issue number | 9 |
| DOIs | |
| State | Published - May 2008 |
Bibliographical note
Funding Information:Acknowledgment is made to the Donors of the American Chemical Society Petroleum Research Fund, for support of this research. The authors acknowledge support of the National Center for Electron Microscopy, Lawrence Berkeley Laboratory, which is supported by the US Department of Energy under Contract No. DE-AC02-05CH11231.
Keywords
- Dealloy
- Gold
- Grain boundaries
- Nanoporous
- Porous materials
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys