Few-layer flakes of Molybdenum Disulphide produced by anodic arc discharge in pulsed mode

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