The fate of mass selected silver clusters deposited on Pd(100)
We present a new experiment to monitor ionized atom and mass selected cluster depositions in real time using specular reflected thermal helium scattering. Monomer Ag ions with an incident kinetic energy of E/sub dep/=20 eV and E/sub dep/=95 eV create surface defects on Pd(100) which affect the surface morphology even at 400 K surface temperature. The defect production is the dominant process responsible for the reflectivity decay at low surface temperatures. Kr/sup +/ ions deposited under identical conditions confirm this. Silver clusters (Ag/sub 7/) with an incident energy of 2.85 and of 13.5 eV/atom become severely fragmented upon impact, the remaining "cluster-like" features being implanted fragments, whose size increases with incident energy.
Keywords: adsorption ; atom surface impact; helium neutral atoms; palladium ; silver deposited mass selected Ag clusters; Pd100 ; real time; specular reflected thermal He scattering; surface defects; surface morphology; defect production; Kr + deposition; implanted fragments; 400 K; Pd ; Ag A6845D (Evaporation and condensation interface adsorption and desorption kinetics); A8265M (Sorption and accommodation coefficients surface chemistry); A7920R (Atomic and molecular beam interactions with surfaces); A68; A82; A79; A6; A8; A7
Record created on 2006-07-25, modified on 2016-08-08