Electron attachment to water clusters under collision-free conditions

Abstract

Si22~Si100 all have IPs between 4.99 and 6.42 eV. Si6_u+ are found to be dominant photofragments from the larger silicon clusters. The overall silicon cluster distribution produced from this source is nearly independent of cluster size, showing only minor intensity alterations and the expected decrease to larger sizes. From this we conclude that the previous interpretation5 of the high-intensity PMS at 6.42 eV is likely incorrect because ion photochemistry was not taken into consideration.

Electron-induced chemistry in microhydrated sulfuric acid clusters

“…The electron attachment to the pure water clusters is inefficient (Knapp et al, 1987;Lengyel et al, 2017b); thus, we can see only the electron attachment to the mixed clusters. The ionization of an isolated sulfuric acid (Adams et al, 1986) proceeds via dissociative electron attachment (DEA):…”

Resonance and Threshold Phenomena in Low-Energy Electron Collisions with Molecules and Clusters

“…Another intriguing result in cluster anion formation is the observation of a prominent resonance at zero energy (indicative of an s-wave attachment process) in cases where such a feature is absent in the monomer (Ma¨rk et al, 1985;Stamatovic´, 1988;Ma¨rk, 1991). The first observations of these 'zero energy resonances' for clusters of oxygen (Ma¨rk et al, 1985), carbon dioxide (Stamatovic et al, 1985a, b;Knapp et al, 1985Knapp et al, , 1986a and water (Knapp et al, 1986b(Knapp et al, , 1987 were made by groups at Innsbruck and Konstanz at too broad energy widths (0.5-1.0 eV), as to elucidate possible structure (e.g. due to vibrational effects) and to thoroughly understand the origin of these zero energy peaks.…”

Excess electron localization sites in neutral water clusters

“…This approach is analogous to the experiments of Knapp et al who performed electron attachment to presumably colder water clusters under collision-free conditions, and detected long-lived, more weakly bound water cluster anions. 28,29 The attachment process is studied here by statistically analyzing the localization sites on neutral water clusters taken from equilibrium molecular dynamics trajectories. In particular, we examine whether there exist stable interior vs. exterior, surface, initial localization sites, and evaluate their relative importance.…”