Nano Archive

Large-scale production of carbon-coated copper nanoparticles for sensor applications

Athanassiou, E. K. and Grass, Robert N. and Stark, W. J. (2006) Large-scale production of carbon-coated copper nanoparticles for sensor applications. NANOTECHNOLOGY, 17 (6). pp. 1668-1673.

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Copper nanoparticles with a mean carbon coating of about 1 nm were continuously produced at up to 10 g h(-1) using a modified flame spray synthesis unit under highly reducing conditions. Raman spectroscopy and solid state C-13 magic angle spinning nuclear magnetic resonance spectroscopy revealed that the thin carbon layer consisted of a sp(2)-hybridized carbon modification in the form of graphene stacks. The carbon layer protected the copper nanoparticles from oxidation in air. Bulk pills of pressed carbon/copper nanoparticles displayed a highly pressure- and temperature-dependent electrical conductivity with sensitivity at least comparable to commercial materials. These properties suggest the use of thin carbon/copper nanocomposites as novel, low-cost sensor materials and offer a metal-based alternative to the currently used brittle oxidic spinels or perovskites.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Analytical Science > Nanotechnology for sensing and actuating
ID Code:3760
Deposited By:SPI
Deposited On:22 Jan 2009 12:52
Last Modified:26 Mar 2009 14:55

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