Nanoscale heterogeneous dynamics probed by nanosecond x-ray speckle visibility spectroscopy
Abstract
We report observations of nanosecond nanometer scale heterogeneous dynamics in a free flowing colloidal jet revealed by ultrafast x-ray speckle visibility spectroscopy. The nanosecond double-bunch mode of the Linac Coherent Light Source free electron laser enabled the production of pairs of femtosecond coherent hard x-ray pulses. By exploring the anisotropic summed speckle visibility which relates to the correlation functions, we are able to evaluate not only the average particle flow rate in a colloidal nanoparticle jet, but also the heterogeneous flow field within. The reported methodology presented here establishes the foundation for the study of nano- and atomic-scale heterogeneous fluctuations in complex matter using x-ray free electron laser sources.
Keywords
Cite
@article{arxiv.2103.11231,
title = {Nanoscale heterogeneous dynamics probed by nanosecond x-ray speckle visibility spectroscopy},
author = {Yanwen Sun and Gabriella Carini and Matthieu Chollet and Franz-Josef Decker and Mike Dunne and Paul Fuoss and Stephan O. Hruszkewycz and Thomas J. Lane and Kazutaka Nakahara and Silke Nelson and Aymeric Robert and Takahiro Sato and Sanghoon Song and G. Brian Stephenson and Mark Sutton and Tim B. Van Driel and Clemens Weninger and Diling Zhu},
journal= {arXiv preprint arXiv:2103.11231},
year = {2021}
}