| Original Articles |
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Kinetics and Mechanism of Nanostructures in Oxidation of
Si1-xGex Alloys |
| HUANG Wei-Qi1;CAI Shao-Hong2 |
| 1Department of Physics, Guizhou Educational College,
Guiyang 550003
2Department of Physics, Guizhou University, Guiyang 550003
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| Cite this article: |
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HUANG Wei-Qi, CAI Shao-Hong 2002 Chin. Phys. Lett. 19 1657-1659 |
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Abstract We investigate the oxidation behaviour of Si1-xGex alloys (x= 0.05, 0.15, and 0.25). The oxidation of SiGe films with different compositions was carried out in O2 (dry) atmosphere at 800 °C , 900 °C, and 1000 °C, respectively, for various lengths of time. The thickness and property of nanoparticle and nanolayer in oxide films and germanium segregation in oxidation of SiGe alloys are measured by using a high precision ellipsometer. The results are in good agreement with the Rutherford backscattering spectrometry, profile dektak instrument and high-resolution scanning transmission electron microscopy. We found that the Ge content in the oxide layer increases with the Ge content in SiGe alloys, the Ge content in the oxide film decreases with the increasing oxidation temperature and time. Rejection of Ge results in piling up of Ge at the interface between the growing SiO2
of nanostructure of oxide and Ge segregation in oxidation of
Si1-xGex alloys.
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| Keywords:
61.46.+w
68.65.-k
81.07.-b
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Published: 01 November 2002
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| PACS: |
61.46.+w
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68.65.-k
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(Low-dimensional, mesoscopic, nanoscale and other related systems: structure and nonelectronic properties)
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81.07.-b
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(Nanoscale materials and structures: fabrication and characterization)
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