Formation of the Core-Shell Structures from Janus-Like Nanoclusters Under Low-Energy Argon Particles Impacts

100 and 500 ps evolution of free Janus-like Cu-Au and Cu-Bi clusters, which consisted of 390 atoms, after the impacts with argon projectiles was simulated using the method of molecular dynamics. Ar-1 and Ar-13 particles with energies from 0.05 to 1.4 keV were used for bombardment of the target. Ar-13 impacts induced a few times higher cluster temperatures and an order of magnitude higher sputtering yields as compared to Ar-1. For the case of 300 eV Ar-13 particle bombardment of Cu-Bi cluster formation of core-shell structure with mainly Cu core and Bi shell was induced; withal Cu-Au nanoparticle tended to form nearly homogenous mixture with increased Au concentration in the near-surface layers. Ar-1 bombardment induced less intense atomic displacements and leaded to eccentric enriched copper core in the Cu-Bi cluster and inhomogeneous mixture in the Cu-Au cluster with even greater internal concentration of gold.