Microstructure evolution in nanoporous gold thin films made from sputter-deposited precursors
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- Microstructure evolution in nanoporous gold thin films made from sputter-deposited precursors
- Gwak, Eun-Ji; Kang, Na-Ri; Baek, Un Bong; Lee, Hae Moo; Nahm, Seung Hoon; Kim, Ju-Young
- Nanoporous gold; Porous material; Sputtering; Surface diffusion; Thin films
- Issue Date
- PERGAMON-ELSEVIER SCIENCE LTD
- SCRIPTA MATERIALIA, v.69, no.10, pp.720 - 723
- We fabricate almost crack-free 1.5 μm thick nanoporous gold thin films using free-corrosion dealloying and transfer processes from sputter-deposited precursors. By controlling the temperature and the concentration of the nitric acid solution during free-corrosion dealloying, we obtain ligament sizes in nanoporous gold between 22 and 155 nm. We investigate the effects of dissolution rate of Ag atoms, surface diffusivity of Au atoms and formation of Ag oxide on nanoporosity evolution.
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