Entrapment of gold catalyst in silicon/silicon-oxide nanowires

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...

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Main Authors: Li, Feng Ji, Zhang, Sam, Lee, Jyh-Wei, Zhao, Dongliang
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2015
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Online Access:https://hdl.handle.net/10356/104318
http://hdl.handle.net/10220/24648
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1043182020-03-07T13:22:23Z Entrapment of gold catalyst in silicon/silicon-oxide nanowires Li, Feng Ji Zhang, Sam Lee, Jyh-Wei Zhao, Dongliang School of Mechanical and Aerospace Engineering DRNTU::Engineering::Nanotechnology 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. 2015-01-16T02:31:03Z 2019-12-06T21:30:17Z 2015-01-16T02:31:03Z 2019-12-06T21:30:17Z 2014 2014 Journal Article 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. https://hdl.handle.net/10356/104318 http://hdl.handle.net/10220/24648 10.1166/nnl.2014.1833 en Nanoscience and nanotechnology letters © 2014 American Scientific Publishers.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Nanotechnology
spellingShingle DRNTU::Engineering::Nanotechnology
Li, Feng Ji
Zhang, Sam
Lee, Jyh-Wei
Zhao, Dongliang
Entrapment of gold catalyst in silicon/silicon-oxide nanowires
description 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.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Li, Feng Ji
Zhang, Sam
Lee, Jyh-Wei
Zhao, Dongliang
format Article
author Li, Feng Ji
Zhang, Sam
Lee, Jyh-Wei
Zhao, Dongliang
author_sort Li, Feng Ji
title Entrapment of gold catalyst in silicon/silicon-oxide nanowires
title_short Entrapment of gold catalyst in silicon/silicon-oxide nanowires
title_full Entrapment of gold catalyst in silicon/silicon-oxide nanowires
title_fullStr Entrapment of gold catalyst in silicon/silicon-oxide nanowires
title_full_unstemmed Entrapment of gold catalyst in silicon/silicon-oxide nanowires
title_sort entrapment of gold catalyst in silicon/silicon-oxide nanowires
publishDate 2015
url https://hdl.handle.net/10356/104318
http://hdl.handle.net/10220/24648
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