A dynamic landscape from femtoseconds to minutes for electron solvation at ice-metal interfaces

Journal Of Physical Chemistry C 113, 979 - 988 (2009)

A dynamic landscape from femtoseconds to minutes for electron solvation at ice-metal interfaces

U. Bovensiepen, C. Gahl, J. Stähler, M. Bockstedte, F. Baletto, S. Scandolo, X.-Y. Zhu, A. Rubio, M. Wolf

Electron transfer and solvation dynamics were studied at crystalline ice-metal interfaces by femtosecond time-resolved two-photon photoelectron spectroscopy and ab initio calculations. Following optical excitation into delocalized image potential states, solvated electrons form at preexisting defects at the ice surface. We monitor the stabilization and decay of these trapped electrons continuously from femtoseconds up to minutes and describe their time- and temperature- dependent binding energy simultaneously by a stretched exponential behavior. First principle calculations follow the underlying molecular motion microscopically and shed light on the collective character of the nuclear rearrangement that determines the energetics over all timescales.

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http://dx.doi.org/10.1021/jp806997d

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