Carbonaceous Particles Production in a Sputtering Discharge

Physics

Scientific paper

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Dusty Plasmas, Carbon, Sputtering, Glow Discharges, Dusty Or Complex Plasmas, Plasma Crystals

Scientific paper

Spherical dust particles have been produced in argon glow discharge by sputtering of a graphite cathode. Their size varies from 40 to 200 nm depending on the distance between the two electrodes and the largest ones have a cauliflower shape. Simulations giving the evolution of the energy distribution of sputtered carbon atoms suggest a mechanism of growth by carbon vapour condensation. The chemical composition and structure of particles have been investigated by infrared spectroscopy and appear to be a complex arrangement of the carbon atoms and hetero-atoms.

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