X-Ray Fluorescence Correlation Spectroscopy: A Method for Studying Particle Dynamics in Condensed Matter

2 February 1998

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 80 (5) , 1110-1113
https://doi.org/10.1103/physrevlett.80.1110

Abstract

We have demonstrated that x-ray fluorescence correlation spectroscopy, in conjunction with microfocused synchrotron x-ray beams, can be used for elucidating particle dynamics. The dynamics of gold and ferromagnetic colloidal particles and aggregates undergoing both diffusion and sedimentation in water has been studied by measuring the time autocorrelation of the x-ray fluorescence intensity from a small illuminated volume. The dynamical parameters obtained are in excellent agreement with theoretical estimates and other measurements. Potential applications of the technique are discussed.

Keywords

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