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Photon correlation spectroscopy: X rays versus visible light
Physical Review E, 2000We have performed combined dynamic light scattering (DLS) and dynamic x-ray scattering (DXS) experiments on dense colloidal suspensions. The intermediate scattering functions obtained with these two techniques are compared directly. In the case of optically index matched samples, the comparison demonstrates that DXS yields accurate and reliable results.
Riese, D.O. +5 more
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X-ray Photon Correlation Spectroscopy of Filler in Rubber
Japanese Journal of Applied Physics, 2007We performed X-ray photon correlation spectroscopy (XPCS) of rubber containing filler during vulcanization. Using XPCS, we successfully measured the change in the scattering intensity fluctuation, that is, the structural fluctuation of filler in rubber during vulcanization. XPCS also revealed the change in intensity fluctuation with sample temperature.
Yuya Shinohara +5 more
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Microrheology of polymeric solutions using x-ray photon correlation spectroscopy
Journal of Physics: Condensed Matter, 2005We demonstrate the technique of XPCS microrheology on opaque polymeric solutions (1-20% w/w) using colloidal silica probes. The short time decay of the intensity correlation function provides the mean square displacement (MSD) of the colloidal probes.
A, Papagiannopoulos +4 more
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Effect of x-ray beamline optics on x-ray photon correlation spectroscopy experiments
SPIE Proceedings, 2007We have evaluated the applicability of vertically-focusing kinoform lenses for tailoring the vertical coherence length of storage-ring undulator x-ray beams so that the entirety of the coherent flux can be used for small angle multi-speckle x-ray photon correlation spectroscopy (XPCS) experiments. We find that the focused beam produced by a kinoform
A. R. Sandy +6 more
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Effects of the Grazing Incidence Geometry on X-ray Photon Correlation Spectroscopy Measurements
Langmuir, 2023X-ray photon correlation spectroscopy (XPCS) is a versatile tool to measure dynamics on the nanometer to micrometer scale in bulk samples. XPCS has also been applied in grazing incidence (GI) geometry to examine the dynamics of surface layers. However, considering GI scattering experiments more universally, the GI geometry leads to a superposition of ...
Christopher R. Greve +7 more
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Photon Correlation Spectroscopy of Colloidal Palladium Using a Coherent X-Ray Beam
Physical Review Letters, 1996We have used an intense coherent x-ray beam and a real time digital autocorrelator to study the low frequency dynamics of colloidal palladium in glycerol by x-ray photon correlation spectroscopy (XPCS). The translational diffusion was studied in the q range from 1.5 3 1023 to 6 3 1023 A21 and in the temperature range from 279 to 293 K.
Thurn-Albrecht, T. +6 more
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X-ray Photon Correlation Spectroscopy
1997The new field of x-ray photon correlation spectroscopy (XPCS) offers an unprecedented opportunity to extend the range of length scales over which a material’s low frequency dynamics can be studied down to interatomic spacings. The ctitical decelopment which has now made XPCS a feasible technique is the high brightness of insertion devices at second and
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X‐ray Photon Correlation Spectroscopy of Dynamics in Thermosensitive Gels
Macromolecular Symposia, 2007AbstractSummary: Temperature‐sensitive hydrogels undergo a volume phase transition (VPT) when heated above a critical temperature Tc. For the poly(N‐isopropyl acrylamide) (PNIPA)‐water system, Tc. = 34 °C. Below Tc the gels are transparent and highly swollen. On warming above Tc they promptly turn white and start to deswell.
Erik Geissler +4 more
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X-Ray Photon Correlation Spectroscopy (XPCS)
2008G. Grübel, A. Madsen, A. Robert
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