Abstract

Complex fluids have structures on length scales from tens to thousands of Angstroms. Such fluids contain either distinct colloidal particles (or self-assembled structures), or sample-spanning connected domains. In either case, their scattering spectra can be analyzed to give important information. If particles or disconnected structures are present, both inter- and intra-particle scattering contribute to the measured small-angle scattering spectra. Using the concept of a colloidal macrofluid enables the use of statistical thermodynamic theories to calculate the important effects of interparticle interactions on the scattering spectra. Methods for the analysis of such spectra are reviewed. If the fluid structures are connected, more general treatments of the data based on the density autocorrelation function are appropriate, and such approaches are also summarized.

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