Ultrafast electron solvation at the room temperature ionic liquid/metal interface

Alex J. Shearer, Benjamin W Caplins, David E. Suich, Charles B. Harris

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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 languageEnglish (US)
Title of host publicationUltrafast Phenomena XIX - Proceedings of the 19th International Conference
EditorsLouis DiMauro, Regina de Vivie-Riedle, Kaoru Yamanouchi, Makoto Kuwata-Gonokami, Steven Cundiff
PublisherSpringer Science and Business Media, LLC
Number of pages4
ISBN (Electronic)9783319132419
StatePublished - 2015
Event19th International Conference on Ultrafast Phenomena, 2014 - Okinawa, Japan
Duration: Jul 7 2014Jul 11 2014

Publication series

NameSpringer Proceedings in Physics
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941


Other19th International Conference on Ultrafast Phenomena, 2014

Bibliographical note

Publisher Copyright:
© Springer International Publishing Switzerland 2015.


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