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Dynamics of hard sphere suspensions using dynamic light scattering and X-ray photon correlation spectroscopy: Dynamics and scaling of the intermediate scattering function

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Original languageEnglish
Article number054505
Pages (from-to)-
Number of pages9
JournalThe Journal of Chemical Physics
Volume134
Issue number5
DOIs
StatePublished - 7 Feb 2011

Abstract

Intermediate scattering functions are measured for colloidal hard sphere systems using both dynamic light scattering and x-ray photon correlation spectroscopy. We compare the techniques, and discuss the advantages and disadvantages of each. Both techniques agree in the overlapping range of scattering vectors. We investigate the scaling behavior found by Segre and Pusey [Phys. Rev. Lett. 77, 771 (1996)] but challenged by Lurio et al. [Phys. Rev. Lett. 84, 785 (2000)]. We observe a scaling behavior over several decades in time but not in the long-time regime. Moreover, we do not observe long-time diffusive regimes at scattering vectors away from the peak of the structure factor and so question the existence of long-time diffusion coefficients at these scattering vectors. (C) 2011 American Institute of Physics. [doi:10.1063/1.3525101]

    Research areas

  • CONCENTRATED COLLOIDAL SUSPENSIONS, PARTICLES, BEHAVIOR, DENSE

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