Tuning atomic-scale mixing of nanoparticles produced by atmospheric-pressure spark ablation.

ABSTRACT: Nanoparticles (NPs) mixed at the atomic scale have been synthesized by atmospheric-pressure spark ablation using pairs of Pd and Hf electrodes. Gravimetric analysis of the electrodes showed that the fraction of each material in the resulting mixed NPs can be varied from ca. 15-85 at% to 85-15 at% by employing different combinations of electrode polarities and thicknesses. These results were also qualitatively corroborated by microscopy and elemental analysis of the produced NPs. When using pairs of electrodes having the same diameter, the material from the one at negative polarity was represented at a substantially higher fraction in the mixed NPs regardless of whether a pair of thin or thick electrodes were employed. This can be attributed to the higher ablation rate of the electro

SUBMITTER: Petallidou KC 

PROVIDER: S-EPMC10697000 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature