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Abstract:Large quantities of β-SiC/SiOx coaxial nanocables have been synthesized with the presence of nickel catalyst by chemical vapor reaction using a mixture of milled Si and SiO2 powders and CH4 as the raw materials in a graphite reaction cell at relatively low temperature. Their microstructures were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersed X-ray (EDX) and X-ray diffraction (XRD). The synthesized β-SiC/SiOx coaxial nanocables possess a β-SiC crystal core with a uniform diameter of 10-60 nm and an amorphous silicon oxide wrapping layer with tens of nanometers in thickness, and their lengths are up to several tens of micrometers. The vapor-liquid-solid (VLS) mechanism was proposed to elucidate the growth process of β-SiC/SiOx coaxial nanocables. © 2007 Elsevier B.V. All rights reserved.
Volume:39
Issue:1
Translation or Not:no