Abstract
Ultrafast electron solvation was studied in thin films of the room temperature ionic liquid [Bmpyr]+ [NTf2]- on a Ag(111) substrate. Two-photon photoemission spectra reveal a solvation effect which increases from a 250 meV shift in under 400 fs for the monolayer to a 1 eV shift in over 100 ps for the trilayer. The state’s binding energy relaxes along the same path for all coverages at a given temperature, suggesting that the solvation process is insensitive to film thickness. Time-dependent population analysis showed that the lifetime of solvation changes with coverage due to charge screening. In the monolayer coverage regime, the state has dispersive, delocalized character at early times and nondispersive, localized character after 200 fs.
Original language | English (US) |
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Title of host publication | Ultrafast Phenomena XIX - Proceedings of the 19th International Conference |
Editors | Louis DiMauro, Regina de Vivie-Riedle, Kaoru Yamanouchi, Makoto Kuwata-Gonokami, Steven Cundiff |
Publisher | Springer Science and Business Media, LLC |
Pages | 317-320 |
Number of pages | 4 |
ISBN (Electronic) | 9783319132419 |
DOIs | |
State | Published - 2015 |
Event | 19th International Conference on Ultrafast Phenomena, 2014 - Okinawa, Japan Duration: Jul 7 2014 → Jul 11 2014 |
Publication series
Name | Springer Proceedings in Physics |
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Volume | 162 |
ISSN (Print) | 0930-8989 |
ISSN (Electronic) | 1867-4941 |
Other
Other | 19th International Conference on Ultrafast Phenomena, 2014 |
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Country/Territory | Japan |
City | Okinawa |
Period | 7/7/14 → 7/11/14 |
Bibliographical note
Publisher Copyright:© Springer International Publishing Switzerland 2015.