Results 21 to 30 of about 17,751 (261)

Atomic Migration Studies with X-Ray Photon Correlation Spectroscopy [PDF]

Diffusion Foundations, 2014
The new technique of atomic-scale X-ray Photon Correlation Spectroscopy (aXPCS) makesuse of a coherent X-ray beam to study the dynamics of various processes in condensed matter systems.Particularly atomistic migration mechanisms are still far from being understood in most of intermetallicalloys and in amorphous systems.
Stana, Markus, Ross, Manuel, Sepiol, Bogdan   +2 more
openaire   +4 more sources

Kinoform optics applied to X-ray photon correlation spectroscopy

Journal of Synchrotron Radiation, 2010
Moderate-demagnification higher-order silicon kinoform focusing lenses have been fabricated to facilitate small-angle X-ray photon correlation spectroscopy (XPCS) experiments. The geometric properties of such lenses, their focusing performance and their applicability for XPCS measurements are described.
A R Sandy, K Evans-Lutterodt, A F Isakovic   +2 more
exaly   +3 more sources

Direct observation of ultrafast cluster dynamics in supercritical carbon dioxide using X-ray Photon Correlation Spectroscopy [PDF]

Nature Communications
Supercritical fluids exhibit distinct thermodynamic and transport properties, making them of particular interest for a wide range of scientific and engineering applications.
Arijit Majumdar, Haoyuan Li, Priyanka Muhunthan, Alexander Späh, Sanghoon Song, Yanwen Sun, Matthieu Chollet, Dimosthenis Sokaras, Diling Zhu, Matthias Ihme   +9 more
doaj   +2 more sources

Ferroelectric domain wall dynamics characterized with X-ray photon correlation spectroscopy. [PDF]

Proc Natl Acad Sci U S A, 2018
Significance The dynamics in many complex systems is essentially heterogeneous and involves a series of discrete events—in particular, local structural changes. The nature and scale of these changes may vary greatly, ranging from rearrangements of atomic positions during phase transitions to displacements of tectonic plates during earthquakes.
Gorfman S, Bokov AA, Davtyan A, Reiser M, Xie Y, Ye ZG, Zozulya AV, Sprung M, Pietsch U, Gutt C.   +9 more
europepmc   +5 more sources

The Effect of Intensity Fluctuations on Sequential X-ray Photon Correlation Spectroscopy at the X-ray Free Electron Laser Facilities

Crystals, 2020
How materials evolve at thermal equilibrium and under external excitations at small length and time scales is crucial to the understanding and control of material properties. X-ray photon correlation spectroscopy (XPCS) at X-ray free electron laser (XFEL)
Yue Cao, Dina Sheyfer, Zhang Jiang, Siddharth Maddali, Hoydoo You, Bi-Xia Wang, Zuo-Guang Ye, Eric M. Dufresne, Hua Zhou, G. Brian Stephenson, Stephan O. Hruszkewycz   +10 more
doaj   +2 more sources

AI-NERD: Elucidation of relaxation dynamics beyond equilibrium through AI-informed X-ray photon correlation spectroscopy [PDF]

Nature Communications
Understanding and interpreting dynamics of functional materials in situ is a grand challenge in physics and materials science due to the difficulty of experimentally probing materials at varied length and time scales.
James P. Horwath, Xiao-Min Lin, Hongrui He, Qingteng Zhang, Eric M. Dufresne, Miaoqi Chu, Subramanian K.R.S. Sankaranarayanan, Wei Chen, Suresh Narayanan, Mathew J. Cherukara   +9 more
doaj   +2 more sources

Structural dependency of polymer dynamics by means of small-angle X-ray photon correlation spectroscopy and wide-angle X-ray scattering on the D2AM beamline [PDF]

Journal of Synchrotron Radiation
X-ray photon correlation spectroscopy (XPCS) has become a pivotal technique for exploring nanoscale dynamic phenomena across various materials, facilitated by advancements in synchrotron radiation sources and beamline upgrades.
Grégory Stoclet, Duncan Schwaller, Romain Garlet, Frédéric Livet, Gilbert A. Chahine, Nils Blanc, Maxime Dupraz   +6 more
doaj   +2 more sources

Multicomponent dynamics in amorphous ice studied using X-ray photon correlation spectroscopy at elevated pressure and cryogenic temperatures [PDF]

Communications Chemistry
Knowing the pressure dependence of glass forming liquids is important in various contexts. Here, we study the case of supercooled water, which has at least two different amorphous states with different densities.
Aigerim Karina, Hailong Li, Tobias Eklund, Marjorie Ladd-Parada, Bernhard Massani, Mariia Filianina, Neha Kondedan, Andreas Rydh, Klara Holl, Ryan Trevorah, Simo Huotari, Robert P. C. Bauer, Claudia Goy, Nele N. Striker, Francesco Dallari, Fabian Westermeier, Michael Sprung, Felix Lehmkühler, Katrin Amann-Winkel   +18 more
doaj   +2 more sources

Observation of Heterodyne Mixing in Surface X-Ray Photon Correlation Spectroscopy Experiments

Physical Review Letters, 2003
We report measurements of propagating capillary waves on a liquid water surface at T=5 degrees C with x-ray photon correlation spectroscopy. The experiment has been performed under grazing incidence conditions with an incoming x-ray beam below the critical angle of total external reflection. In the q region investigated the measured intensity-intensity
Gutt, C., Ghaderi, T., Chamard, Virginie, Madsen, A., Seydel, T., Tolan, M., Sprung, M., Grübel, G., Sinha, S. K.   +8 more
openaire   +4 more sources

Rotational diffusion in concentrated platelet systems measured with X-ray photon correlation spectroscopy [PDF]

Journal of Chemical Physics, 2013
Using X-ray photon correlation spectroscopy we have measured the rotational modes of concentrated charged gibbsite platelets in the isotropic regime. This has been done by analyzing the data qualitatively using available theories for non-interacting systems. The relaxation spectra do not follow the same pattern as for spherical particles at larger wave
Fabian Westermeier
exaly   +6 more sources