Abstract
A simple, direct synthesis method was used to grow the core-shell SiC - SiOx nanowires by heating the NiO catalyzed silicon substrate. The carbothermal reduction of WO3 by C provided a reductive environment to synthesize the crystalline SiC nanowires covered with the SiO x sheath in the growth temperature of 1000–1100°C. After hydrofluoric acid (HF) etching, the cubic β- SiC nanowires were extracted from the core-shell nanowires in large quantities. A solid-liquid-solid (SLS) mechanism was proposed for the growth of the core-shell SiC - SiO x nanowires.
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