title: Mg-catalyzed autoclave synthesis of aligned silicon carbide nanostructures.
abstract: In this article, a novel magnesium-catalyzed co-reduction route was developed for the large-scale synthesis of aligned beta-SiC one-dimensional (1D) nanostructures at relative lower temperature (600 degrees C). By carefully controlling the reagent concentrations, we could synthesize beta-SiC rodlike and needlelike nanostructures. The possible growth mechanism of the as-synthesized beta-SiC 1D nanostructures has been investigated. The structure and morphology of the as-synthesized beta-SiC nanostructures are characterized using X-ray diffraction, Fourier transform infrared absorption, and scanning and transmission electron microscopes. Raman and photoluminescence properties are also investigated at room temperature. The as-synthesized beta-SiC nanostructures exhibit strong shape-dependent field emission properties. Corresponding to their shapes, the as-synthesized nanorods and nanoneedles display the turn-on fields of 12, 8.4, and 1.8 V/microm, respectively.
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale, Department of Chemistry, University of Science & Technology of China, Hefei, Anhui 230026, P.R. China.
authors.forename: Guangcheng
authors.initials: G
authors.lastname: Xi
authors.forename: Yankuan
authors.initials: Y
authors.lastname: Liu
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Liu
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Wang
authors.forename: Yitai
authors.initials: Y
authors.lastname: Qian