Self-Assembled Low-Resistivity NiSi Nanowire Arrays on Epitaxial Si0.7Ge0.3 on (001)Si |
| Journal |
Advances in Science and Technology (Volume 51) |
| Volume |
Disclosing Materials at the Nanoscale |
| Edited by |
P. VINCENZINI and G. MARLETTA |
| Pages |
42-47 |
| DOI |
10.4028/www.scientific.net/AST.51.42 |
| Online since |
October, 2006 |
| Authors |
Wen Wei Wu,
Lih Juann Chen
|
| Keywords |
NiSi Nanowires, Self-Assembly, Si1-xGex/Si Heterostructures, Step Bunching |
| Abstract |
Self-assembled low-resistivity NiSi nanowire arrays have been grown on relaxed
epitaxial Si0.7Ge0.3 on (001)Si. The formation of the one-dimensional ordered structure is attributed
to the nucleation of NiSi nanodots on the surface undulations induced by step bunching on the
surface of SiGe film owing to the miscut of the wafers from normal to the (001)Si direction.
Furthermore, the nanodots were connected along individual arrays and turned into nanowires with
increasing amount of Ni and a-Si. Since the periodicity of surface bunching can be tuned with
appropriate vicinality and misfit, the undulated templates promise to facilitate the growth of ordered,
catalyst-free NiSi nanowires with selected periodicity and size for utilization in high-speed Si-Ge
nanodevices. |
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