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Title: Entrapment of gold catalyst in silicon/silicon-oxide nanowires
Authors: Li, Feng Ji
Zhang, Sam
Lee, Jyh-Wei
Zhao, Dongliang
Keywords: DRNTU::Engineering::Nanotechnology
Issue Date: 2014
Source: Li, F. J., Zhang, S., Lee, J.-W., & Zhao, D. (2014). Entrapment of gold catalyst in silicon/silicon-oxide nanowires. Nanoscience and nanotechnology letters, 6(10), 922-926.
Series/Report no.: Nanoscience and nanotechnology letters
Abstract: Metal catalyst sometimes is entrapped in crystalline silicon (Si)/amorphous Si-oxide nanowires. Till now, however, the entrapping mechanism is still unclear. In this work, Si/Si-oxide nanowires were grown via thermal annealing of a Si wafer coated with a 10 nm thick layer of gold (Au) which acts as catalyst. Au nanospheres or elongated core are occasionally entrapped in the nanowires. Transmission electron microscopy, energy dispersive X-ray spectroscopy and selected area electron diffraction were employed to study the structure of the grown nanowires and their relationship with the seeding Au particles. The entrapment of the Au catalyst is attributed to the eutectic precipitation of Au and Si in the Si-supersaturated Au–Si–O droplet as the temperature is below the eutectic point. A new mechanism elucidates the entrapping process.
DOI: 10.1166/nnl.2014.1833
Rights: © 2014 American Scientific Publishers.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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