Journal
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
Volume 80, Issue -, Pages 19-24Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physe.2016.01.002
Keywords
SiC nanowire; Molten salt; Carbothermal reduction; Silica fume; Photoluminescence
Funding
- National Natural Science Foundation of China [U1204505]
- State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science Technology [G201508]
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The growth of silicon carbide (SiC) crystal generally requires a high temperature, especially when low quality industrial wastes are used as the starting raw materials. In this work, SiC/SiO2 core-shell nanowires (NWs) were synthesized from low cost silica fume and sucrose via a molten salt mediated carbothermal reduction (CR) route. The molten salt was found to be effective in promoting the SiC growth and lowering the synthesis temperature. The resultant NWs exhibited a heterostructure composed of a 3C-SiC core of 100 nm in diameter and a 5-10 nm thick amorphous SiO2 shell layer. The photoluminescence spectrum of the achieved SiC NWs displayed a significant blue shift (a dominant luminescence at round 422 nm), which suggested that they were high quality and could be a promising candidate material for future optoelectronic applications. (C) 2016 Elsevier B.V. All rights reserved.
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