Photoemission studies of electron localization at very low excess energies

Photon-driven reduction reactions on silver

“…This is in contrast with the typical evolution of the photoemission current, which tends to decay rapidly with the onset of the 'dark' reduction process, due to a depletion of the o.o07 reactant (scavenger) close to the electrode surface [17,18] (the capture of a hydrated electron is considered to occur at a distance of 1-3 nm from the sur-~_ o.oo8 ~J face of the cathode [20]). In the case of the reduction ~ E of CO2 at silver, the observed photocurrent persists 3 (and even continues to increase) on going to poten-~ 0.oo~ rials negative with respect to the onset of the formao tion of carbon monoxide in the 'dark' (-1.2V) and remains large at potentials close to the maximum 0.004 faradaic efficiency for the production of CO (-1.7 V).…”

“…with CO2 and light was modulated at 7 Hz. chemical behaviour of silver in solutions containing dissolved CO2 (such as NaC104, NaHCO3 or CsHCO3) was the shape of the spectral dependence of the photocurrent exhibiting a sharp maximum near the photon energy of 3.4-3.5 eV assigned to surface plasmons at the silver-aqueous solution interface [8,20,21] (cf. Fig.…”

Fast Processes in UV‐Two‐Photon Excitation of Pare Liquids

“…It should be noted that 0.58 nm corresponds to only about two molecular diameters and 0.95 to threefrom injection studies however, the mean path of real low-energy free electrons has been determined as 3 -4 nm [29], i.e. more than ten molecular diameters.…”

Application d’un modèle hybride à l’étude des dommages radio-induits par un faisceau d’électrons sur la molécule d’ADN dans son environnement

“…Pour simuler le transport des électrons de subexcitation, nous avons utilisé la méthode au coup par coup, basée sur des sections efficaces totales de diffusion élastique et inélastique établies par Michaud et Sanche (1987b) et Neff et al (1980, jusqu'à atteindre l'énergie de thermalisation (0,025 eV). À 10 -12 s, la trace électronique, issue de l'irradiation, est hétérogène dans la mesure où les espèces chimiques qui la composent sont en proportions très différentes.…”