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Fabrication of Centimeter-scale Well-aligned SiC/SiO2 Core-shell Nanowires by Interlaminar Vapor-diffusion Reaction Method

Author(s): Jian Wei, Kezhi Li, Jin Chen, Hudie Yuan.

Abstract:

Centimeter-scale well-aligned SiC/SiO2 core-shell nanowires were fabricated by a novel interlaminar vapor-diffusion reaction method in a double-channel quartz tube. The synthesized nanowires grew in a uniform direction perpendicular to a porous graphite substrate and were parallel to one another. The core-shell nanowires are 10 millimeters long and consist of β-SiC crystalline core of with diameters of 30-60 nm wrapped with an amorphous silica layer of about 20 nm. The formation mechanism of the well-aligned nanostructure is probably ascribed to the downward vapor-solid growth process and gravity revulsive effect that plays an important role because of super high aspect ratio of the as-received nanowires.

Keywords: Array, carbide, core-shell, centimeter-scale, nanowires.

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Article Details

VOLUME: 8
ISSUE: 5
Year: 2012
Page: [720 - 725]
Pages: 6
DOI: 10.2174/157341312802884454
Price: $58