Mo3Ni2N Nanoparticle Generation by Spark Discharge

Abstract

Spark ablation is an advantageous method for the generation of metallic nanoparticles with defined particle sizes and compositions. The reaction of the metal particles with the carrier gas during the synthesis and, therefore, the incorporation of those light elements into structural voids or even compound formation was confirmed for hydrides and oxides but has only been suspected to occur for nitrides. In this study, dispersed nanoparticles of Mo3Ni2N and Mo with Janus morphology, and defined particle sizes were obtained by spark discharge generation as a result of carrier gas ionization and characterized using transmission electron microscopy and powder X-ray diffraction. Metal nitrides possess beneficial catalytic and thermoelectric properties, as well as high hardness and wear resistance. Therefore, this method offers the possibility of controlled synthesis of materials which are interesting for numerous applications.

Spark Discharge Synthesis and Characterization of Ge/Sn Janus Nanoparticles

“…Core–shell nanoparticles with a tin core and complex Ge/Sn oxide shell [ 51 ] and a Cu core and Ag shell [ 52 ] were also produced by the co-sparking method. The first attempts at generating nanoparticles with a Janus morphology and biphasic/bicrystalline type by spark discharge were presented at the beginning of 2023 by the Mo 3 Ni 2 N case [ 53 ]. The additional system of the in-flow sintering of agglomerates formed in the spark discharge was used to reshape agglomerates into separated large nanoparticles and can lead to the segregation of some phases [ 52 ].…”