Static and dynamic light scattering in turbid suspensions

The application of static and dynamic light scattering to many colloidal sy stems of practical interest has often been considered too complicated due t o strong multiple scattering. There are two new approaches to overcome this problem. One of them aims at suppressing contributions from multiple scatt ering using novel cross-correlation schemes. While this relies on the suppr ession of multiple scattering, the so-called diffusing wave spectroscopy (D WS) works in the limit of very strong multiple scattering. DPI'S can be use d for the characterization of dynamic and static properties of colloidal sy stems on a large range of time and length scales ranging from a few Angstro ms to hundreds of nanometers. We demonstrate that a wealth of information c an be obtained from these methods on the structure, dynamics, interaction e ffects, stability, aggregation, and sol-gel transition in colloidal dispers ions.