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Plasma-assisted self-catalytic vapour-liquid-solid growth of β-SiC nanowires
journal contribution
posted on 2009-01-01, 00:00 authored by J Zhang, Q Wang, F Wang, X Chen, Weiwei LeiWeiwei Lei, Q Cui, G ZouLong and straight β-SiC nanowires are synthesized via the direct current arc discharge method with a mixture of silicon, graphite and silicon dioxide as the precursor. Detailed investigations with x-ray diffraction, scanning electron microscopy, energy dispersive x-ray spectroscopy, Raman scattering spectroscopy, transmission electron microscopy and selected area electron diffraction confirm that the β-SiC nanowires, which are about 100–200 nm in stem diameter and 10–20 µm in length, consist of a solid single-crystalline core along the (1 1 1) direction wrapped with an amorphous SiOx layer. A broad photoluminescence emission peak with a maximum at about 336 nm is observed at room temperature. A direct current arc plasma-assisted self-catalytic vapour–liquid–solid process is proposed as the growth mechanism of the β-SiC nanowires. This synthesis technique is capable of producing SiC nanowires free of metal contamination with a preferential growth direction and a high aspect ratio, without the designed addition of transition metals as catalysts.
History
Journal
Journal of physics D : applied physicsVolume
42Issue
3Pagination
035108 - 35108Publisher
Institute of Physics PublishingLocation
Bristol, EnglandPublisher DOI
ISSN
0022-3727eISSN
1361-6463Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2009, Institute of Physics PublishingUsage metrics
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