Abstract
Suspensions of charged polystyrene microspheres have received intense interest in recent years because of the discovery that they could form ordered crystalline phases in Ultraclean water that could be investigated with quasielastic light-scattering methods.1 As such, the suspensions can be well characterized and form model systems for studying some basic condensed-matter physics. These colloidal suspensions exhibit a phase transition in which the microspheres go from a highly ordered crystalline state to a disordered, "liquid" state when an electrolyte is added at constant temperature.
© 1991 Optical Society of America
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