Quasielastic light scattering from solutions of lollipop-shaped particles

✍ Scribed by G. Koopmans; B. J. Van Der Meer; P. C. Hopman; J. Greve

• Publisher: Wiley (John Wiley & Sons)
• Year: 1979
• Tongue: English
• Weight: 384 KB
• Volume: 18
• Category: Article
• ISSN: 0006-3525
• DOI: 10.1002/bip.1979.360180615

✦ Synopsis

An expression is derived for the field correlation function of the light scattered from a solution of lollipop-shaped particles. Such particles are a tractable model of certain bacteriophages. They are assumed to consist of an ellipsoidal head containing optically anisotropic scattering material and a tail which does not scatter. Because of the tail, Brownian rotational movement occurs around a center of rotational friction which is at a distance ro from the center of the head. The dependence of the field correlation function C(T) on the rotational diffusion coefficient DR is given by the factor

It is shown that the tail causes the coefficients Bf to be different from zero for all values of 1. Therefore, C(T) contains a term proportional to exp(-2DRT), which is not present when ro = 0. We give plots of l?f for various combinations of parameters. It turns out that dynamic light scattering may be used to measure ro.