Impact of ice structure on ultrafast electron dynamics in D2O clusters on Cu(111).
The structure of D2O clusters on a Cu(111) surface and the femtosecond dynamics of photoexcited excess electrons are investigated by low-temperature scanning tunneling microscopy and two-photon photoemission spectroscopy. Two types of amorphous ice clusters, porous and compact, which exhibit characteristic differences in electron dynamics, are identified. By titration with Xe we show that in both structures solvated electrons preferentially bind on the cluster surface.
Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin-Dahlem, Germany.
J
J
Stähler
M
M
Mehlhorn
U
U
Bovensiepen
M
M
Meyer
D O
DO
Kusmierek
K
K
Morgenstern
M
M
Wolf