期刊
NANO LETTERS
卷 9, 期 3, 页码 1158-1163出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl803799q
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资金
- Swiss National Science Foundation
- European Commission
- U.S. Department of Energy [DE-AC52-07NA27344]
The evolution of the grain structure, internal strain, and the lattice misorientations of nanoporous gold during dealloying of bulk (31)) 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 crystallographic 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.
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