Large-scale synthesis of β-SiC/SiOx coaxial nanocables by chemical vapor reaction approach

✍ Scribed by C.S. Wang; J.L. Zhang; A.L. Meng; M. Zhang; Z.J. Li

• Book ID: 104084689
• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 654 KB
• Volume: 39
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/j.physe.2007.02.002

✦ Synopsis

Large quantities of b-SiC/SiO x coaxial nanocables have been synthesized with the presence of nickel catalyst by chemical vapor reaction using a mixture of milled Si and SiO 2 powders and CH 4 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 b-SiC/SiO x coaxial nanocables possess a b-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 b-SiC/SiO x coaxial nanocables.