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1 Materials Science Poland

1 2010

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Fabrication and performance of carbon coated copper nanoparticles

Li L. P., Zhang H. Y., Pang J. S., Lin J.

Materials Science Poland

2010

Vol. 28, No. 1

181--187

Carbon coated copper nanoparticles were synthesized by the carbon arc discharge method using a powder mixture containing copper and carbon at the ratio different than in the raw material. The structure, topography, size distribution, phase composition and anti-oxidation property of the nanoparticles were characterized by X-ray diffraction, transmission electron microscopy, thermogravimetry and differential scanning calorimetry experiments. The results indicated that carbon coated copper nanoparticles had a clear core-shell structure, the core of the particles being copper single crystal, and the shell of the particles - a carbon layer with a graphite-like structure. Carbon coated copper nanoparticles had diameters of ca. 20-60 nm. As the copper content increased, the inner copper core became more crystallized. Copper promoted catalysis to the external carbon layers, the graphitization degree became more obvious as the content of copper increased. The outer graphitic carbon layers effectively prevented oxidation of the copper core inside. The oxidation resistance of carbon coated copper nanoparticles was superior to that of pure copper powder.