Femtosecond Soft-X-ray Absorption Spectroscopy of Liquids with a Water-Window High-Harmonic Source.
- Smith AD Laboratory of Physical Chemistry, ETH Zürich, 8093 Zürich, Switzerland.
- Balčiu Nas T GAP-Biophotonics, Université de Genéve, 1205 Geneva, Switzerland.
- Chang YP GAP-Biophotonics, Université de Genéve, 1205 Geneva, Switzerland.
- Schmidt C GAP-Biophotonics, Université de Genéve, 1205 Geneva, Switzerland.
- Zinchenko K Laboratory of Physical Chemistry, ETH Zürich, 8093 Zürich, Switzerland.
- Nunes FB Laboratory of Physical Chemistry, ETH Zürich, 8093 Zürich, Switzerland.
- Rossi E Laboratory of Physical Chemistry, ETH Zürich, 8093 Zürich, Switzerland.
- Svoboda V Laboratory of Physical Chemistry, ETH Zürich, 8093 Zürich, Switzerland.
- Yin Z Laboratory of Physical Chemistry, ETH Zürich, 8093 Zürich, Switzerland.
- Wolf JP GAP-Biophotonics, Université de Genéve, 1205 Geneva, Switzerland.
- Wörner HJ Laboratory of Physical Chemistry, ETH Zürich, 8093 Zürich, Switzerland.
- 2020-02-20
Published in:
- The journal of physical chemistry letters. - 2020
English
Femtosecond X-ray absorption spectroscopy (XAS) is a powerful method to investigate the dynamical behavior of a system after photoabsorption in real time. So far, the application of this technique has remained limited to large-scale facilities, such as femtosliced synchrotrons and free-electron lasers (FEL). In this work, we demonstrate femtosecond time-resolved soft-X-ray absorption spectroscopy of liquid samples by combining a sub-micrometer-thin flat liquid jet with a high-harmonic tabletop source covering the entire water-window range (284-538 eV). Our work represents the first extension of tabletop XAS to the oxygen edge of a chemical sample in the liquid phase. In the time domain, our measurements resolve the gradual appearance of absorption features below the carbon K-edge of ethanol and methanol during strong-field ionization and trace the valence-shell ionization dynamics of the liquid alcohols with a temporal resolution of ∼30 fs. This technique opens unique opportunities to study molecular dynamics of chemical systems in the liquid phase with elemental, orbital, and site sensitivity.
- Language
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- English
- Open access status
- hybrid
- Identifiers
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- DOI 10.1021/acs.jpclett.9b03559
- PMID 32073862
- Persistent URL
- https://folia.unifr.ch/global/documents/213504
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