Fabrication and observation of nanowire-assemblages of Si-Ge |
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Authors: | Q Hu H Araki H Suzuki N Ishikawa W Yang T Noda |
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Institution: | (1) National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan, JP |
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Abstract: | A few of the interesting structures made by the assemblage of Si-Ge nanowires fabricated by the floating-zone melting-vapor
method have been observed. They reveal shapes that are similar to coral, jellyfish and sea anemones. The pre-sintered substrate
bar has some large crystalline particles (1–15 μm), which produce sites that are energetically predisposed to nucleation.
The peculiar structures created by the assemblage of Si-Ge nanowires form on favored nucleation sites that consist of numerous
bundles of nanowires with diameters of 20–50 nm. The periodic variation in the diameter of the bundles of nanowires is a common
feature of these structures. In addition, a growth mechanism assisted by the coexistence of Ge and Si-Ge oxides is suggested.
The growth process of these assemblages opens up new possibilities for the study of the growth mechanism of Si-Ge nanowires.
Received: 25 July 2002 / Accepted: 9 September 2002 / Published online: 17 December 2002
RID="*"
ID="*"Corresponding author. Fax: 81-298/59-2736, E-mail: HU.Quanli@nims.go.jp |
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Keywords: | PACS: 61 46 +W 61 50 NW 68 70 +W |
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