On the microstructure of nanoporous gold: An X-ray diffraction study

Steven Van Petegem, Stefan Brandstetter, Robert Maass, Andrea M. Hodge, Bassem S. El-Dasher, Jürgen Biener, Bernd Schmitt, Camelia Borca, Helena Van Swygenhoven

Research output: Contribution to journalArticlepeer-review


The evolution of the grain structure, internal strain, and the lattice misorientations of nanoporous gold during dealloying of bulk (3D) Ag-Au alloy samples was studied by various in situ and ex situ X-ray diffraction techniques including powder and Laue diffraction. The experiments reveal that the dealloying process preserves the original crystallography structure but leads to a small spread in orientations within individual grains. Initially, most grains develop in-plane tensile stresses, which are partly released during further dealloying. Simultaneously, the feature size of the developing nanoporous structure increases with increasing dealloying time. Finally, microdiffraction experiments on dealloyed micron-sized nanoporous pillars reveal significant surface damage introduced by focused ion beam milling.

Original languageEnglish (US)
Pages (from-to)1158-1163
Number of pages6
JournalNano letters
Issue number3
StatePublished - Mar 11 2009

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering


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