Structural Dynamics of Materials Probed by X-Ray Photon Correlation Spectroscopy

Madsen, Anders; Fluerasu, Andrei; Ruta, Beatrice

doi:10.1007/978-3-030-23201-6_29

Cited by 15 publications

(15 citation statements)

References 98 publications

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“…XPCS probes the dynamic properties of matter by analyzing temporal correlations in real time [10][11][12][13][14][15][16][17][18][19]. It is the X-ray analogue to dynamical light scattering (DLS) [20], extending the probed length scale to atomic dimensions.…”

Section: Introductionmentioning

confidence: 99%

From Femtoseconds to Hours—Measuring Dynamics over 18 Orders of Magnitude with Coherent X-rays

2021

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X-ray photon correlation spectroscopy (XPCS) enables the study of sample dynamics between micrometer and atomic length scales. As a coherent scattering technique, it benefits from the increased brilliance of the next-generation synchrotron radiation and Free-Electron Laser (FEL) sources. In this article, we will introduce the XPCS concepts and review the latest developments of XPCS with special attention on the extension of accessible time scales to sub-μs and the application of XPCS at FELs. Furthermore, we will discuss future opportunities of XPCS and the related technique X-ray speckle visibility spectroscopy (XSVS) at new X-ray sources. Due to its particular signal-to-noise ratio, the time scales accessible by XPCS scale with the square of the coherent flux, allowing to dramatically extend its applications. This will soon enable studies over more than 18 orders of magnitude in time by XPCS and XSVS.

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Section: Introductionmentioning

confidence: 99%

From Femtoseconds to Hours—Measuring Dynamics over 18 Orders of Magnitude with Coherent X-rays

2021

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“…The effects of HIs are more evident in the intermediate scattering function f q (t), which is the q-component of the normalized number-density correlation function (Hansen & McDonald, 2013). HIs have been measured by dynamic light scattering (Pusey & Tough, 1983;Pusey & van Megen, 1983) and are nowadays typically probed with X-ray photon correlation spectroscopy (XPCS) experiments, a well established technique in the study of dynamical processes on the nanometre and sub-nanomatre length scales (Sutton et al, 1991;Abernathy et al, 1998;Grü bel et al, 2008;Shpyrko, 2014;Madsen et al, 2016;Sandy et al, 2018;Lehmkü hler et al, 2021). For diffusing systems the intermediate scattering function can be described by f q ðtÞ ¼ exp Àq 2 wðq; tÞ…”

Section: Introductionmentioning

confidence: 99%

Microsecond hydrodynamic interactions in dense colloidal dispersions probed at the European XFEL

Dallari

Jain

Sikorski

et al. 2021

IUCrJ

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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 the development of free-electron lasers (FELs) and fourth-generation synchrotron light-sources, time-resolved experiments in such time and length ranges will become routinely accessible in the near future. In the present work we report our findings on prototypical soft-matter systems, composed of charge-stabilized silica nanoparticles dispersed in water, with radii between 12 and 15 nm and volume fractions between 0.005 and 0.2. The sample dynamics were probed by means of X-ray photon correlation spectroscopy, employing the megahertz pulse repetition rate of the European XFEL and the Adaptive Gain Integrating Pixel Detector. We show that it is possible to correctly identify the dynamical properties that determine the diffusion constant, both for stationary samples and for systems driven by XFEL pulses. Remarkably, despite the high photon density the only observable induced effect is the heating of the scattering volume, meaning that all other X-ray induced effects do not influence the structure and the dynamics on the probed timescales. This work also illustrates the potential to control such induced heating and it can be predicted with thermodynamic models.

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“…where the measurable quantities are CðÁtÞ = ðhI 2 res i À hI res i 2 Þ=hI res i 2 , the normalized variance (speckle contrast) of the summed speckle pattern, and = (hI 2 i À hIi 2 )/ hIi 2 the speckle contrast of a single image. g 2is also accessible by regular X-ray photon correlation spectroscopy (XPCS) (Grü bel et al, 2007;Madsen et al, 2020) in sequential mode with…”

Section: X-ray Split-and-delay Linementioning

confidence: 99%

Materials Imaging and Dynamics (MID) instrument at the European X-ray Free-Electron Laser Facility

Madsen¹,

Hallmann²,

Ansaldi³

et al. 2021

J Synchrotron Rad

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The Materials Imaging and Dynamics (MID) instrument at the European X-ray Free-Electron Laser (EuXFEL) facility is described. EuXFEL is the first hard X-ray free-electron laser operating in the MHz repetition range which provides novel science opportunities. The aim of MID is to enable studies of nano-structured materials, liquids, and soft- and hard-condensed matter using the bright X-ray beams generated by EuXFEL. Particular emphasis is on studies of structure and dynamics in materials by coherent scattering and imaging using hard X-rays. Commission of MID started at the end of 2018 and first experiments were performed in 2019.

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Structural Dynamics of Materials Probed by X-Ray Photon Correlation Spectroscopy

Cited by 15 publications

References 98 publications

From Femtoseconds to Hours—Measuring Dynamics over 18 Orders of Magnitude with Coherent X-rays

From Femtoseconds to Hours—Measuring Dynamics over 18 Orders of Magnitude with Coherent X-rays

Microsecond hydrodynamic interactions in dense colloidal dispersions probed at the European XFEL

Materials Imaging and Dynamics (MID) instrument at the European X-ray Free-Electron Laser Facility

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