title: Ultrafast dynamics of electron localization and solvation in ice layers on Cu(111).
abstract: The femtosecond dynamics of localization and solvation of photoinjected electrons in ultrathin layers of amorphous solid H2O and D2O have been studied by time- and angle-resolved two-photon-photoelectron spectroscopy. After electron transfer from the metal substrate into the conduction band of ice, the excess electron localizes within the first 100 fs in a state at 2.9 eV above E(F), which is further stabilized by 300 meV on a time scale of 0.5-1 ps due to molecular rearrangements in the adlayer. A pronounced change of the solvation dynamics at a coverage of approximately 2 bilayers is attributed to different rigidity of the solvation shell in the bulk and near the surface of ice.
authors.affiliation: Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Gahl
authors.forename: U
authors.initials: U
authors.lastname: Bovensiepen
authors.forename: C
authors.initials: C
authors.lastname: Frischkorn
authors.forename: M
authors.initials: M
authors.lastname: Wolf