Structural investigation of MoS_2 core-shell nanoparticles formed by an arc discharge in water

摘要

The intense environment of an electric arc has been used to create MoS_2 core-shell particles. Instead of running the arc in a vacuum chamber under reduced pressure conditions, an arc discharge in water was employed. The arc was run between a carbon cathode and a Mo hollow rod anode whose interior was packed with MoS_2 powder. High-resolution electron microscopy and image simulations have been used to characterize the structure of the resultant material which was seen to consist of agglomerates of polyhedral MoS_2 cages with filled cores. A correlation between the growth conditions and the observed nanostructure is presented.