Abstract
This chapter discusses the structure of concentrated colloidal dispersions. Concentrated colloidal dispersions are dispersions in which the colloidal particles are frequently in contact with each other. The chapter explores how the pair interactions between the particles determine the structure of colloidal dispersions. The many-body character of a dispersion is described. Colloidal dispersions are usually multi-component mixtures of solvent molecules, low-molecular solutes (e.g. electrolytes), and particles in the colloidal size range. Defining the notion of structure implies establishing the spatial distribution of the particles. In practical natural or industrial dispersions, it is realized that the systems are mostly heterogeneous and the particles heterodisperse and heteromorphic (typically for many practical systems like paints and slurries). On the other hand, for model colloids, structures can very well be defined in terms of measurable quantities. For such systems, it is also possible to set up a theoretical framework that allows predicting structural properties in terms of measurable quantities.
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