Electron impact ionization of silver clusters Ag n ,n≦36

Abstract

Electron impact ionization of gas phase silver clusters Ag,, n<36 has been achieved in the threshold region. The vertical ionization potentials in this region clearly demonstrate the evidence of shell effects as well as a distinct even-odd oscillation up to n-~ 20. Their general size dependence is somewhat different from that of the alkali metal clusters due to the presence of the delectrons.

Structure of small silver clusters and static response to an external electric field

“…On the experimental side, it is worthwhile to mention that different experimental ESR and Raman spectra of Ag 5 have been interpreted by both trigonal bipyramid [26] and planar geometries [27], respectively. As shown in Table I, the vertical IP calculated for the trapezoid agrees quite well with the experimental result [28] and it is what underpins our predicted lowest-energy structure.…”

“…The comparison between the calculated IPs and the experimental measurements reported in Ref. [28] favor more the T d structure than the D 2d one, however the assignment of the structural minimum is clearly inverted if we use the experimental IP (6.40 eV) measured in Ref. [31].…”

Atomic Cluster Generation with an Atmospheric Pressure Spark Discharge Generator

“…We assume that this peak shows overlapping signals from various cluster species that cannot be resolved from one another. The possible configurations are Ag 7 , Ag 7 O, Ag 7 O 2 , and Ag 9 (Jackschath et al 1992;Weis et al 2002;Schmidt et al 2003).…”

Structures, Stabilities, Reactivities, and (Hyper)Polarizabilities of Small Gold Clusters

“…It has been verified that in general the gold clusters and compounds present large relativistic effects when compared to those of the copper and silver ones. 33,34 We would like to cite the experiments about vertical ionization potentials and electron affinities performed by some research groups, 28,[35][36][37][38][39] where the results of all studied gold clusters surpass those of the copper and silver ones (see Figure 2 of Wesendrup et al). 29 As a consequence of this finding, the properties and surfaces of the gold clusters will be differently affected.…”

“…1 Theoretical 2-11 and experimental [12][13][14][15][16][17][18][19] studies about metal clusters have been carried out for about thirty three years. Among the metal clusters, there is an increasing interest [20][21][22][23][24][25][26][27][28][29][30][31][32] in the noble metals (Cu, Ag, and Au) because they can be considered as a connection between the alkali metals and the transition metals.…”