Mass-selected deposition of Ag 7 on Pd(100). Evidence for implantation and strong fragmentation
We present a new experiment which is able to monitor mass-selected cluster depositions in red time using specular reflected thermal helium scattering. Ag/sub 7//sup +/ with an incident energy of 2.86 and of 13.6 eV/atom is deposited on Pd(100) at different surface temperatures. The measurement technique relies on the large atomic cross sections Sigma of adsorbates for diffuse helium scattering. An analysis of Sigma shows that heptamers become fragmented upon impact for both energies and that some of the cluster atoms are implanted into the surface layer.
Keywords: adsorption ; atomic clusters; dissociation ; molecule surface impact; palladium ; silver ; surface chemistry Pd100 ; Ag 7; mass selected deposition; implantation ; strong fragmentation; specular reflected thermal He scattering; surface temperature; diffuse He scattering; Pd A7920N (Atom molecule and ion surface impact); A6845D (Evaporation and condensation interface adsorption and desorption kinetics); A8265M (Sorption and accommodation coefficients surface chemistry); A8265J (Heterogeneous catalysis at surfaces and other surface reactions); A3380G (Diffuse molecular spectra predissociation photodissociation); A8230L (Decomposition reactions pyrolysis dissociation and group ejection); A79; A68; A82; A33; A7; A6; A8
Record created on 2006-07-25, modified on 2016-08-08