کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9829698 | 1524496 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Catalytic growth of α-FeSi2 and silicon nanowires
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
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چکیده انگلیسی
Via vaporization of Fe and Si powders mixed with a molar ratio of 1:1, α-FeSi2 nanowires were synthesized on one Si wafer, where the temperature is higher than 950 °C and Fe supply is enough, and meantime Si nanowires were obtained on the other Si wafer, where the temperature is lower than 500 °C and Fe atoms are much less than Si atoms in vapor. The two kinds of nanowires have diameters of 40-80 nm and lengths of 3-10 μm. Their shapes, crystallinity, and compositions are studied in terms of field emission scanning electron microscopy, X-ray diffraction spectra, and energy dispersive X-ray spectroscopy. From the obtained experimental results, we explain the growth mechanism of the two kinds of nanowires using the vapor-liquid-solid growth model. Two important conditions, high temperatures and enough Fe supply, are emphasized for syntheses of the α-FeSi2 nanowires.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 280, Issues 1â2, 15 June 2005, Pages 286-291
Journal: Journal of Crystal Growth - Volume 280, Issues 1â2, 15 June 2005, Pages 286-291
نویسندگان
Z.Y. Zhang, X.L. Wu, L.W. Yang, G.S. Huang, G.G. Siu, Paul K. Chu,