Journal
PHYSICAL REVIEW LETTERS
Volume 127, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.058001
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Funding
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-76SF00515]
- DOE Office of Science, Basic Energy Sciences, Division of Materials Science and Engineering
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Observations of nanosecond nonuniform colloidal dynamics in a free flowing liquid jet were reported using ultrafast x-ray speckle visibility spectroscopy. The study utilized a double-bunch mode to produce femtosecond coherent x-ray pulses and evaluated the average particle flow rate and nonuniform flow field within the colloidal nanoparticle jet by exploring anisotropy in speckle patterns. This methodology establishes a foundation for studying nano- and atomic-scale inhomogeneous fluctuations in complex matter using x-ray free electron laser sources.
We report observations of nanosecond nonuniform colloidal dynamics in a free flowing liquid jet using ultrafast x-ray speckle visibility spectroscopy. Utilizing a nanosecond double-bunch mode, the Linac Coherent Light Source free electron laser produced pairs of femtosecond coherent hard x-ray pulses. By exploring anisotropy in the visibility of summed speckle patterns which relates to the correlation functions, we evaluate not only the average particle flow rate in a colloidal nanoparticle jet, but also the nonuniform flow field within. The methodology presented here establishes the foundation for the study of nano- and atomic-scale inhomogeneous fluctuations in complex matter using x-ray free electron laser sources.
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