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Few-layer flakes of Molybdenum Disulphide produced by anodic arc discharge in pulsed mode by Corbella, Carles; Portal, Sabine; Saadi, M. A. S. R.; Solares, Santiago D.; Kundrapu, Madhusudhan N.; Keidar, Michael is a scholarly article available to read on EtoBox.

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Here, the synthesis of Molybdenum Disulphide (MoS2) flakes by means of anodic atmospheric arc discharge is reported for the first time. The vertical electrode configuration consisted of a compound anode (hollow graphite anode filled with MoS2 powder) and a solid graphite cathode placed just above of the compound anode. Arc processes were operated in pulsed mode to preferentially evaporate the powder component from the anode and to minimize Carbon ablation. Pulsed anodic arc discharges were conducted at 2 Hz and 10% duty cycle in 300 Torr of Helium with a peak current of 250-300 A and peak voltage of 35 V. A probe made of Tungsten wire was placed in the vicinity of the arc column to collect the evaporated material. The measured thickness profile was correlated to the particle flux distribution and it was fitted by a simple model of plasma expansion. During pulse phase, electron density was estimated around 5E22 m-3 or higher, and ion current density was of the order of 10 A/mm2. Morphology, structure and composition of the samples were characterized by Raman spectroscopy, atomic force microscopy (AFM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and x

Author

Corbella, Carles; Portal, Sabine; Saadi, M. A. S. R.; Solares, Santiago D.; Kundrapu, Madhusudhan N.; Keidar, Michael

Published

2019

Language

EN