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- W2998981120 abstract "Nanoporous gold is widely used in research and nanotechnology because of its diverse properties, including high surface area and catalytic activity. The ligament size is usually considered as the only parameter controlling thermal stability and mechanical properties of nanoporous gold. Recently we developed a method for creating nanoporous single crystal gold particles using eutectic decomposition of Au-Ge, followed by selective etching of Ge. Here, we used this novel method to create nanoporous gold particles with controlled ligament sizes by changing the initial sample relative concentrations of gold and germanium. When investigated from 1 to 4 hour at 250 to 400 degrees C the material was thermally stable up to 350 degrees C, which is higher than the thermal stability of classical nanoporous gold with similar ligament sizes prepared by dealloying. Mechanical properties were examined utilizing nanoindentation of nanoporous gold before and after annealing. For smaller ligament sizes, hardness increases with annealing temperature up to 300 degrees C and then strongly decreases. For larger ligament sizes, hardness decreases with increasing annealing temperature. Young modulus was unchanged up to 300 degrees C." @default.
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- W2998981120 date "2019-12-30" @default.
- W2998981120 modified "2023-09-27" @default.
- W2998981120 title "Pore and Ligament Size Control, Thermal Stability and Mechanical Properties of Nanoporous Single Crystals of Gold" @default.
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