Electron solvation and solvation-induced crystallization of an ammonia film on Ag(111) studied by 2-photon photoemission
SCIE
SCOPUS
- Title
- Electron solvation and solvation-induced crystallization of an ammonia film on Ag(111) studied by 2-photon photoemission
- Authors
- Kwon, Hyuksang; Hwang, Kiwook; Park, Juyeon; Ryu, Sunmin; Kim, Seong Keun
- Date Issued
- 2011-10
- Publisher
- Royal Society of Chemistry (RSC)
- Abstract
- Intermolecular interaction plays a crucial role in electron solvation in the condensed phase. Here, we present a femtosecond time-resolved and angle-resolved 2-photon photoemission (2PPE) study on the dynamics of electron solvation in a 2-dimensional ammonia film on a metal substrate. While the weakly chemisorbed first monolayer (ML) supports delocalized image-potential (IP) states that resemble those of the bare Ag(111) substrate, an additional monolayer localizes the IP state with a larger binding energy obtained through a pre-solvation process. Structural disorder in the metastable ammonia films (>2 ML) leads to a prominent photoelectron peak that is attributed to the long-lived trapped electron state (e T) located at 1.5 eV above the Fermi level. Photoinduced crystallization of the metastable phase, verified by the recovery of a delocalized IP state, is suggested to result from inelastic scattering between interfacial electrons and disordered ammonia molecules. This journal is © the Owner Societies.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/120204
- DOI
- 10.1039/c1cp20804g
- ISSN
- 1463-9076
- Article Type
- Article
- Citation
- Physical Chemistry Chemical Physics, vol. 13, no. 39, page. 17785, 2011-10
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