The influence of bombarding particle size on the intensity of the core-shell cluster formation

The 100 ps evolution of free bimetal clusters after Ar
1
and Ar
13
impacts with energies from 100 eV to 1400 eV is performed. The target clusters consisted of two 195-atom parts of two pairs of elements: Cu-Bi and Cu-Au. The formation of core-shell structure with Cu core and Bi shell with different intensity depending on the argon particle energy is identified while practically uniform mixing of Cu and Au atoms in the Cu-Au clusters is observed. In addition, the sputtering effect with thermal yield is much intensive for Ar
13
cluster bombardment of both Cu-Au and Cu-Bi clusters. Thus we expect the possibilities of control of core-shell cluster creation rate and shell density by applying the bombarding particles of different sizes and energies.