The news correspondents obtained a quote from the research, "The dewetting was carried at 700, 800, and 900 degrees C, respectively. The growth of Si or silicide particles occurred after dewetting at 800 and 900 degrees C, and these particles remains even after the dealloying process. This growth is supposed to occur via a solid-liquid-solid (SLS) mechanism, and mainly Ag serves as catalyst."
According to the news reporters, the research concluded: "A 20nm thick thermal SiO2 is sufficient to avoid this reaction between the Au/Ag bilayers and the Si substrate when the dewetting temperature is 700 degrees C."
For more information on this research see: Silicon/silicide grown out of nanoporous gold nanoparticles. Physica Status Solidi A-Applications and Materials Science, 2013;210(8):1512-1515. Physica Status Solidi A-Applications and Materials Science can be contacted at:
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