Production of large sodium clusters (Nax,.x⩽65) by seeded beam expansions

Determining the size-dependent structure of ligand-free gold-cluster ions

“…The ion-intensity distributions that were recorded showed a size-dependent structure, which was interpreted in terms of the spherical jellium model (Knight et al 1984). This model was put forward to rationalize observations originally made for sodium clusters (Kappes et al 1982b). It approximates the electronic structure of simple s 1 -electron metal clusters in terms of the quantum mechanics of uncorrelated electrons moving in a spherical uniformly positively charged potential box (one valence electron per constituent atom).…”

Size dependence of nanostructures: Impact of bond order deficiency

“…They related the F change to the increases of negative electron affinity within the grain due to increased surface hydrogen bonding and with perhaps a contribution from surface defect states. The F of Na particles around 0.4e 2.0 nm size was measured to vary inversely with the size R and lowered the bulk value from 2.75 to 2.25 eV (by 18%) [582]. The majority of the nanotubes have a F of 4.6e4.8 eV at the tips, which is 0.2e0.4 eV lower than that of carbon (graphite) bulk.…”

“…Special wettabilities, such . Size modulated work function of (a) diamond [580] and (b) Na [582] nanocrystals. Recovery of the work function is due to the geometrical flatness [584].…”

Photodissociation Dynamics of 4-Aminobenzonitrile+(Water)nClusters

“…Accordingly, the intensities for small cluster ions increased dramatically as He is used as a carrier gas. As explained by Kappes et al, 23 the above results stem from two factors: one is the number of collisions and the other is the thermal accommodation coefficient. Considering the atomic weight, the mean flow velocity in a helium-seed expansion is the largest of three gases.…”