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...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2015
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| Online Access: | https://hdl.handle.net/10356/104318 http://hdl.handle.net/10220/24648 |
| _version_ | 1811690289246502912 |
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| author | Li, Feng Ji Zhang, Sam Lee, Jyh-Wei Zhao, Dongliang |
| 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 |
| author_sort | Li, Feng Ji |
| collection | NTU |
| 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. |
| first_indexed | 2024-10-01T06:01:38Z |
| format | Journal Article |
| id | ntu-10356/104318 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:01:38Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-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. |
| spellingShingle | DRNTU::Engineering::Nanotechnology Li, Feng Ji Zhang, Sam Lee, Jyh-Wei Zhao, Dongliang Entrapment of gold catalyst in silicon/silicon-oxide nanowires |
| title | 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_short | Entrapment of gold catalyst in silicon/silicon-oxide nanowires |
| title_sort | entrapment of gold catalyst in silicon silicon oxide nanowires |
| topic | DRNTU::Engineering::Nanotechnology |
| url | https://hdl.handle.net/10356/104318 http://hdl.handle.net/10220/24648 |
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