Diamond single micro-crystals and graphitic micro-balls' formation in plasmoids under atmospheric pressure

Ramasamy Pothiraja, Konstantin Kartaschew, Nikita Bibinov, Martina Havenith, Peter Awakowicz


Abstract

Plasmoids are produced in the argon filamentary discharge. By going through hydrocarbon gas, the plasmoids collect carbon material. These plasmoids produce diamond single micro-crystals upon contact on the inner surface of cavity in air atmosphere. When the plasmoid's contact point on the substrate is in inert atmosphere, they deposit their material as micro-balls with a graphite core. The dimension and nature of the micro-materials deposited by the plasmoids are analysed using scanning electron microscopy and Raman microspectroscopy. The compressive residual stress in the deposited micro-diamonds varies in the range -7 to -21 GPa.

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