Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1521885 | Materials Chemistry and Physics | 2014 | 8 Pages |
Abstract
Silicon/silicon carbide (Si/SiC) core-shell nanowires grown on quartz substrates by hot-wire chemical vapor deposition were studied. Nickel was used as a catalyst to induce the growth of these core-shell nanowires followed by the vapor-solid-solid growth mechanism. The nanowires were grown by varying substrate-to-filament distance; ds-f from 1.9 to 3.1Â cm with an interval of 0.4Â cm. Lower ds-f produced a high density of straight core-shell nanowires. A highly crystalline single crystal Si core of the nanowires was produced at lower ds-f as well. Presence of Si and SiC nano-crystallites embedded within an amorphous matrix in the shell of the nanowires exhibited a high intensity of photoluminescence emission spectra from 600 to 1000Â nm. The effects of the ds-f on the structural and optical properties of the nanowires are discussed.
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Authors
Boon Tong Goh, Saadah Abdul Rahman,