The oxidation characteristics of silicon nanowires grown with an au catalyst
| العنوان: | The oxidation characteristics of silicon nanowires grown with an au catalyst |
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| المؤلفون: | Mann Ho Cho, Jae Pyung Ahn, Hong Seok Lee, Jin Won Ma, Woo Jung Lee, Jung Min Bae |
| المصدر: | Nano Research. 5:152-163 |
| بيانات النشر: | Springer Science and Business Media LLC, 2012. |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | Thermal oxidation, Materials science, Alloy, Shell (structure), Nanotechnology, engineering.material, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Catalysis, Stress (mechanics), engineering, General Materials Science, Electrical and Electronic Engineering, Vapor–liquid–solid method, Composite material, Silicon nanowires, Oxidation rate |
| الوصف: | In this study, we investigated the thermal oxidation of silicon nanowires (SiNWs) grown via the vapor-liquid-solid (VLS) method with an Au catalyst. We systematically analyzed the oxidation mechanism of the SiNWs in both the radial and axial directions and mapped the behavior of the Au atoms on the sidewall and at top of the wire as a function of oxidation time. After thermal oxidation at a temperature of 900 °C, two kinds of oxidation behavior in SiNWs were observed: one was conventional radial oxidation and the other was axial oxidation. In particular, the axial oxidation rate at the Si/Au interface increased dramatically compared with the radial oxidation rate, which can be explained by the reaction between the Si atoms precipitated from the Au tip and the O2 gas injected in the area surrounding the Au tip. Additionally, we observed that the oxidation rate in the axial direction was inversely proportional to the wire diameter, which is related to the SiO2 surrounding the Si wire. Moreover, the Au shape changed with respect to the wire diameter, suggesting that both the stress in the Au-Si alloy and the SiO2 shell thickness of the wire critically affect the growth of SiO2 on Au. Open image in new window |
| تدمد: | 1998-0000 1998-0124 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::57b365ab3897e0a2855732abd18b543d https://doi.org/10.1007/s12274-012-0195-4 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........57b365ab3897e0a2855732abd18b543d |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 19980000 19980124 |
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