Premium
X‐ray fluorescence correlation spectroscopy – a tool to study element‐specific dynamics
Author(s) -
Leupold Olaf,
Grübel Gerhard,
Roth Stephan V.,
Schroer Christian,
Roseker Wojciech,
Sikorski Marcin,
Robert Aymeric
Publication year - 2007
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889807017852
Subject(s) - fluorescence correlation spectroscopy , dynamic light scattering , spectroscopy , particle (ecology) , diffusion , analytical chemistry (journal) , nanoparticle , dynamics (music) , colloid , scattering , sedimentation , materials science , fluorescence spectroscopy , fluorescence , chemistry , chemical physics , optics , thermodynamics , nanotechnology , physics , chromatography , paleontology , oceanography , quantum mechanics , sediment , geology , biology , acoustics
We have explored the feasibility of X‐ray fluorescence correlation spectroscopy for studying the dynamics of colloidal particles in solution. We measured suspensions of Au nanoparticles from 5 to 150 nm diameter in water/glycerol mixtures of various compositions. Time‐averaged sample properties were traced via small‐angle X‐ray scattering. The contrast of the measured time‐correlation functions scales as expected with the particle concentration in the sample. The time constants for translational diffusion and sedimentation in water/glycerol mixtures follow only qualitatively the expected behaviour.