Rotational diffusion of nonspherical Brownian particles in a suspension of spheres
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A theory is presented to describe the translational and rotational Brownian motion of a nonspherical tracer particle that interacts with other diffusing spherical particles around it. In order to apply this theory, approximations must be introduced that allow us to express the tracer-diffusion properties of the tracer particle in terms of the static structural properties of the system. We illustrate the application of these results with the calculation of the rotational diffusion coefficient of a Brownian electric dipole that interacts with a Brownian one-component plasma. © 1996 The American Physical Society.
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