Journal
CORROSION SCIENCE
Volume 127, Issue -, Pages 141-146Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2017.08.026
Keywords
Nanoporous gold; Chemical de-alloying; Metallic glass; Raman spectroscopy
Funding
- European Commission [607080]
- BINGO Project [Torino call2014 L2 146]
- Compagnia di SanPaolo
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In this work, the chemical de-alloying behavior of Au30Cu35Ag7Pd3Si20(at.%) amorphous alloy which was rapidly solidified from the melt in the form of ribbons were investigated. First a comparison between samples de alloyed in nitric acid with and without HF was conducted to achieve homogeneous de-alloying process. Then the morphology and structure of nanoporous gold (NPG) were adjusted by tuning the de-alloying parameters, such as HNO3 concentration, electrolyte temperature and de-alloying time. Finally the surface enhanced Raman scattering(SERS) capability of the as-prepared NPG was evaluated using 4,4'-bi-pyridine as probe molecule.
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