Invited paper. Exoelectron emission from solids

Robertson, A.

doi:10.1080/00207218108901363

Cited by 19 publications

(3 citation statements)

References 30 publications

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“…In this context, previous works have shown that implementing electron–hole ( e-h ) pair excitations in the dynamics was feasible. Energy transfer to the metal electrons, upon interaction/scattering of atoms and molecules, has been evidenced in a number of experiments, e.g., in electric current measurements in Schottky diodes − or metal–insulator–metal (MIM) diodes − during exothermic reactions such as adsorption, abstraction, dissociation, and chemisorption; in the detection of particle emission such as electrons (exoelectron emission) or photons (surface chemiluminescence) in exothermic reactions; in measurements of very short vibrational lifetimes of adsorbed molecules; in vibrational excitation measurements in the scattering of NO (HCl) molecules on Ag(111), Cu(100), and Au(111); and in vibrational relaxation measurements in the scattering of vibrationally excited NO molecules on Au(110) . Thus, the ensuing question to answer is whether such energy transfers are relevant for each particular process under study.…”

Section: Introductionmentioning

confidence: 99%

Energy Dissipation to Tungsten Surfaces upon Eley–Rideal Recombination of N₂ and H₂

et al. 2015

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Quasiclassical molecular dynamics simulations are performed to investigate energy dissipation to the (100) and (110) tungsten surfaces upon Eley−Rideal (ER) recombination of H 2 and N 2 . Calculations are carried out within the single adsorbate limit under normal incidence. A generalized Langevin surface oscillator (GLO) scheme is used to simulate the coupling to phonons, whereas electron−hole (e-h) pair excitations are implemented using the local density friction approximation (LDFA). Phonon excitations are found to reduce the ER reactivity for N 2 recombination, but do not affect H abstraction. In contrast, the effect of e-h pair excitations on the ER recombination cross section is small for N 2 , but can be important for H 2 . The analysis of the energy lost by the recombined species shows that most of the energy is dissipated into phonon excitations in the N 2 recombination and into electronic excitations in the H 2 recombination. In all cases, the energy dissipated into e-h pairs is taken away from the translational kinetic energy of the formed molecules, whereas dissipation to phonons, only significant for N 2 , also affects vibration. Interestingly, the electron mediated energy losses are found to be smaller in the case of N 2 when surface motion is allowed.

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Section: Introductionmentioning

confidence: 99%

Energy Dissipation to Tungsten Surfaces upon Eley–Rideal Recombination of N₂ and H₂

et al. 2015

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“…39,42,49 However, to the best of our knowledge, all the above theoretical studies have overlooked any possible effect of electron-hole (e-h) pair excitations on hot-atom abstraction 23,24,28 though their influence has been experimentally suggested. 50 This issue is of prime importance as dissipation to electronic excitations, which is ubiquitous upon interaction/scattering of atoms and molecules with metals, [51][52][53][54][55][56][57][58][59][60][61] was recently predicted to largely dominate the relaxation of light hot-atoms at surfaces, [62][63][64][65][66][67] which was shown by recent experiments. 68 Consequently, it will significantly affect the hyperthermal motion of hot species.…”

mentioning

confidence: 99%

Hydrogen abstraction from metal surfaces: when electron–hole pair excitations strongly affect hot-atom recombination

Galparsoro

Pétuya

Busnengo

et al. 2016

Phys. Chem. Chem. Phys.

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Using molecular dynamics simulations, we predict that the inclusion of nonadiabatic electronic excitations influences the dynamics of preadsorbed hydrogen abstraction from the W(110) surface by hydrogen scattering. The hot-atom recombination, which involves hyperthermal diffusion of the impinging atom on the surface, is significantly affected by the dissipation of energy mediated by electron-hole pair excitations at low coverage and low incidence energy. This issue is of importance as this abstraction mechanism is thought to largely contribute to molecular hydrogen formation from metal surfaces.

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“…To evaluate these surface phenomena, several experimental analyses have been performed using electron emission from the dielectric surface. These include thermoelectronic [5], field electron [6,7], exoelectron [8], and photoelectron [911] emission techniques. Following Krupps study of a correlation between the static electrification and surface states in organic materials [12], Murata investigated the surface states of polymers using the photoelectron emission technique to evaluate their surface states [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of surface current on photoelectron emission from mica

Hashimoto

Sakakibara

2000

Elect. Eng. Jpn.

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The relationship between photoelectron emission and the conduction mechanism on the surface of cleaved muscovite mica film was investigated; that is, under atmospheric conditions and subjected to UV irradiation, a low‐energy photoelectron counter measured the photothreshold energy of photoelectron emission from a surface treated by fast atom bombardment (FAB). Such emission was found to have a close relationship to the surface structure and surface conduction characteristics in that the photothreshold of the FAB‐treated mica surface varied from 5.0 to 5.8 eV, whereas no variation occurred in the untreated surface; the difference being attributed to different carriers of surface current. Results indicate that the surface states of mica play an important role in the electronic conduction of the surface, as well as the photoelectron emission from it. © 2000 Scripta Technica, Electr Eng Jpn, 133(1): 1–10, 2000

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Invited paper. Exoelectron emission from solids

Cited by 19 publications

References 30 publications

Energy Dissipation to Tungsten Surfaces upon Eley–Rideal Recombination of N₂ and H₂

Energy Dissipation to Tungsten Surfaces upon Eley–Rideal Recombination of N₂ and H₂

Hydrogen abstraction from metal surfaces: when electron–hole pair excitations strongly affect hot-atom recombination

Effect of surface current on photoelectron emission from mica

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Invited paper. Exoelectron emission from solids

Cited by 19 publications

References 30 publications

Energy Dissipation to Tungsten Surfaces upon Eley–Rideal Recombination of N2 and H2

Energy Dissipation to Tungsten Surfaces upon Eley–Rideal Recombination of N2 and H2

Hydrogen abstraction from metal surfaces: when electron–hole pair excitations strongly affect hot-atom recombination

Effect of surface current on photoelectron emission from mica

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Product

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Energy Dissipation to Tungsten Surfaces upon Eley–Rideal Recombination of N₂ and H₂

Energy Dissipation to Tungsten Surfaces upon Eley–Rideal Recombination of N₂ and H₂