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Vapor-solid reaction for silicon carbide hollow spherical nanocrystals

Liu, Zhenyu and Ci, Lijie and Jin-Phillipp, N. Y. and Ruehle, M. (2007) Vapor-solid reaction for silicon carbide hollow spherical nanocrystals. JOURNAL OF PHYSICAL CHEMISTRY C, 111 (34). pp. 12517-12521.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp073012g

Abstract

We report the synthesis of silicon carbide (SiC) hollow spherical nanocrystals using a vapor-solid reaction between carbon nanoparticles and silicon monoxide vapor generated from a mixture of silicon and silica. The hollow spherical nanocrystal diameters are related to the diameters of the pristine carbon nanoparticles, showing a shape memory effect. The thickness of the hollow spherical nanocrystals can be controlled by the siliconization degree and carbon nanoparticle multilayer structures. Different analysis techniques recorded the phase conversion of the amorphous carbon into graphitic carbon in the structure of the sp(2) bond state and further into SiC nanocrystal in the structure of the sp(3) diamond-like carbon bond state. The hollow spherical nanocrystals might find applications in catalysis, controlled delivery, gas storage, low-dielectric nanomaterials, acoustic insulation, and nanocomposites.

Item Type:Article
Subjects:Material Science > Functional and hybrid materials
Material Science > Nanofabrication processes and tools
ID Code:3299
Deposited By:Farnush Anwar
Deposited On:15 Jan 2009 14:36
Last Modified:27 Jan 2009 16:06

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