Open Access Nano Express

Synthesis and Photoluminescence Property of Silicon Carbide Nanowires Via Carbothermic Reduction of Silica

Xiaogang Luo12, Wenhui Ma12*, Yang Zhou12, Dachun Liu12, Bin Yang12 and Yongnian Dai12

Author affiliations

1 Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, 650093, Kunming, People’s Republic of China

2 National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, 650093, Kunming, People’s Republic of China

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Citation and License

Nanoscale Research Letters 2009, 5:252-256  doi:10.1007/s11671-009-9474-8

Published: 11 November 2009

Abstract

Silicon carbide nanowires have been synthesized at 1400 °C by carbothermic reduction of silica with bamboo carbon under normal atmosphere pressure without metallic catalyst. X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, transmission electron microscopy and Fourier transformed infrared spectroscopy were used to characterize the silicon carbide nanowires. The results show that the silicon carbide nanowires have a core–shell structure and grow along <111> direction. The diameter of silicon carbide nanowires is about 50–200 nm and the length from tens to hundreds of micrometers. The vapor–solid mechanism is proposed to elucidate the growth process. The photoluminescence of the synthesized silicon carbide nanowires shows significant blueshifts, which is resulted from the existence of oxygen defects in amorphous layer and the special rough core–shell interface.

Keywords:
Silicon carbide nanowires; Carbothermic reduction; Bamboo carbon; Photoluminescence property; Growth mechanism