A multi-step dealloying method to produce nanoporous gold with no volume change and minimal cracking

Ye Sun, T. John Balk

Research output: Contribution to journalArticlepeer-review

96 Scopus citations

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 languageEnglish
Pages (from-to)727-730
Number of pages4
JournalScripta Materialia
Volume58
Issue number9
DOIs
StatePublished - 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

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