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Showing 1–10 of 10 results
Advanced filters: Author: Gilles Doumy Clear advanced filters

  • A high-resolution spectroscopic tool is demonstrated using the stochastically fluctuating intensity spikes in time and energy domains of a self-amplified spontaneous emission X-ray free-electron laser.

    • Kai Li
    • Christian Ott
    • Linda Young
    ResearchOpen Access
    Nature
    Volume: 643, P: 662-668

  • X-ray photoelectron spectroscopy probes the chemical environment in a molecule at a specific atomic site. Here the authors extend this concept with a site selective trigger to follow chemical bond changes as they occur on the femtosecond time scale.

    • Andre Al-Haddad
    • Solène Oberli
    • Christoph Bostedt
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-7

  • Solvent plays a critical role in electron-transfer reactions, but short-range solvation dynamics are challenging to observe. Now, femtosecond X-ray solution scattering has been used to directly monitor the reorganization of water upon ultrafast intramolecular electron transfer in a bimetallic complex. Coherent motions of the first-shell water molecules are observed, arising from changes in solute–solvent hydrogen bonding.

    • Elisa Biasin
    • Zachary W. Fox
    • Munira Khalil
    Research
    Nature Chemistry
    Volume: 13, P: 343-349

  • X-ray free electron lasers provide high photon flux to explore single particle diffraction imaging of biological samples. Here the authors present dynamic electronic structure calculations and benchmark them to single-particle XFEL diffraction data of sucrose clusters to predict optimal single-shot imaging conditions.

    • Phay J. Ho
    • Benedikt J. Daurer
    • Christoph Bostedt
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-9

  • Metal-oxide nanostructures are used in a range of light-driven applications, yet the fundamentals behind their properties are poorly understood. Here the authors probe photoexcited zinc oxide nanoparticles using time-resolved X-ray spectroscopy, identifying photocatalytically-active hole traps as oxygen vacancies in the lattice.

    • Thomas J. Penfold
    • Jakub Szlachetko
    • Christopher J. Milne
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-9

  • Excitonics provides a promising way to manipulate light-matter interactions for advanced optical applications, yet controlling core-exciton dynamics in the X-ray regime is challenging. Here, the authors combine experiments with an ab initio approach developed specifically for modelling pump-probe excitations, revealing how photoexcited carrier distributions can be used to control core-exciton resonances at absorption edges.

    • Thomas C. Rossi
    • Lu Qiao
    • Renske M. van der Veen
    ResearchOpen Access
    Communications Materials
    Volume: 6, P: 1-9

  • XFELs can drive multicore-ionization/excitation processes in the fs timescale of typical core-hole lifetimes in molecules. This paper reports experimental evidence of a single XFEL-pulse-driven resonant double-core excitation mechanism, producing a neutral two-site double-core-hole state in the nitrogen molecule.

    • Eetu Pelimanni
    • Adam E. A. Fouda
    • Gilles Doumy
    ResearchOpen Access
    Communications Physics
    Volume: 7, P: 1-9

  • X-ray free-electron lasers (XFELs) are powerful tools to explore x-ray interactions in atomic and molecular systems at femtosecond timescales. The authors demonstrate a transparent beamsplitter that uses photoelectron spectroscopy combined with a ghost-imaging algorithm to characterize the spiky spectral structure of individual XFEL pulses.

    • Kai Li
    • Joakim Laksman
    • Linda Young
    ResearchOpen Access
    Communications Physics
    Volume: 5, P: 1-8