Dynamic light scattering convenient method

Several methods may be applied to determine the hydrodynamic thickness of adsorbed polymer layers, of which viscosity, sedimentation coefficient (using an ultracentrifuge) and dynamic light scattering measurements are the most convenient. A less accurate method is from zeta potential measurements. These techniques are based on hydrodynamic techniques and these are discussed below. [Pg.110]

The next two methods, spin echo nuclear magnetic resonance and dynamic light scattering, represent the adoption of expensive, complex equipment built to obtain molecular information to the new task of measuring diffusion. Because neither method tries only to measure diffusion coefficients, the accuracy is modest. Neither method requires an initial concentration difference, a major convenience in highly viscous... [Pg.151]