Verena Markmann
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View article: Analysis strategies for time-resolved X-ray solution scattering at high repetition rate XFEL sources
Analysis strategies for time-resolved X-ray solution scattering at high repetition rate XFEL sources Open
With the start of the user program at the European XFEL in 2017, and more recently with the LCLS-II upgrade, the X-ray repetition rate at X-ray free-electron lasers (XFELs) has been pushed into the kilo- and megahertz regimes. These high X…
Excited-state structural characterization of a series of nanosecond-lived [Fe(terpy)2]2+ derivatives using x-ray solution scattering Open
[ F e ( t e r p y ) 2 ] 2 + (terpy = 2,2′:6′,2″-terpyridine) is a transition metal complex where the spin state is photoswitchable and where the properties of the metal-centered quintet excited state (5MC) can be tuned by substituting diff…
Real-time structural dynamics of the ultrafast solvation process around photo-excited aqueous halides Open
Time-resolved X-ray solution scattering with a 1-photon and 2-photon pump qualitatively confirms the ∼0.5 Å increase in the nearest-neighbour halide–oxygen distances of iodide and bromide solvated in water.
Correction: Real-time structural dynamics of the ultrafast solvation process around photo-excited aqueous halides Open
Correction for ‘Real-time structural dynamics of the ultrafast solvation process around photo-excited aqueous halides’ by Verena Markmann et al. , Chem. Sci. , 2024, 15 , 11391–11401, https://doi.org/10.1039/D4SC01912A.
Finite-size Effects on the Calculation of X-ray Scattering from Molecular Dynamics Simulations Open
Structural studies using x-ray scattering methods for investigating molecules in solution are shifting focus towards describing the role and effects of the surrounding solvent. However, forward models based on molecular dynamics (MD) simul…
Finite-size Effects on the Calculation of X-ray Scattering from Molecular Dynamics Simulations Open
Structural studies using x-ray scattering methods to investigate molecules in solution are shifting focus towards including the role and effects of the surrounding solvent. However, forward models based on molecular dynamics (MD) simulatio…
Dynamics and Time Scales of Higher-Order Correlations in Supercooled Colloidal Systems Open
The dynamics and time scales of higher-order correlations are studied in supercooled colloidal systems. A combination of X-ray photon correlation spectroscopy (XPCS) and X-ray cross-correlation analysis (XCCA) shows the typical slowing of …
A versatile chamber for x-ray scattering on liquid jets with sample recycling Open
We introduce the setup of a versatile sample chamber for x-ray scattering experiments on liquids delivered by μ-jets. The simple implementation at x-ray light sources, adaptability to different nozzle types, and the availability of a micro…
Three-step colloidal gelation revealed by time-resolved x-ray photon correlation spectroscopy Open
The gelation of PEGylated gold nanoparticles dispersed in a glycerol–water mixture is probed in situ by x-ray photon correlation spectroscopy. Following the evolution of structure and dynamics over 104 s, a three-step gelation process is f…
Microsecond hydrodynamic interactions in dense colloidal dispersions probed at the European XFEL Open
Many soft-matter systems are composed of macromolecules or nanoparticles suspended in water. The characteristic times at intrinsic length scales of a few nanometres fall therefore in the microsecond and sub-microsecond time regimes. With t…
View article: Nanosecond X-ray photon correlation spectroscopy using pulse time structure of a storage-ring source
Nanosecond X-ray photon correlation spectroscopy using pulse time structure of a storage-ring source Open
X-ray photon correlation spectroscopy (XPCS) is a routine technique to study slow dynamics in complex systems at storage-ring sources. Achieving nanosecond time resolution with the conventional XPCS technique is, however, still an experime…
Emergence of anomalous dynamics in soft matter probed at the European XFEL Open
Significance The European XFEL is a hard X-ray Free-Electron Laser (FEL) with pulse repetition rates in the megahertz regime. Thus, sample dynamics in the microsecond and submicrosecond regime can be accessed by means of X-ray photon corre…
Shear-induced ordering in liquid microjets seen by x-ray cross correlation analysis Open
We applied shear to a silica nanoparticle dispersion in a microfluidic jet device and observed direction-dependent structure along and across the flow direction. The asymmetries of the diffraction patterns were evaluated by x-ray cross cor…
Plasmonic Supercrystals with a Layered Structure Studied by a Combined TEM‐SAXS‐XCCA Approach Open
Supercrystals composed of plasmonic nanoparticles constitute a promising material platform for tailored light‐matter interactions. The optimization of their optical properties requires precise syntheses and a detailed structural characteri…