## Abstract

A theory of rotational Brownian motion of particles with surface charges is developed. It is based on an exact solution of the generalized Hubbard-Onsager equations. Dielectric friction in a polar solvent as well as a local increase of solvent viscosity due to electrostriction are taken into account. It is shown that for irregular surface charge distributions only two parameters are important for rotational Brownian dynamics: The total charge Q = ∑_{i}q_{i}, and the sum of squares of the surface charges, J_{B} = ∑_{i}q^{2}_{i}. Calculations show that the rotational diffusion coefficient depends strongly on the total surface charge, and may differ significantly from the ordinary Stokes value.

Original language | English |
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Pages (from-to) | 957-967 |

Number of pages | 11 |

Journal | Molecular Physics |

Volume | 77 |

Issue number | 5 |

DOIs | |

Publication status | Published - 10 Dec 1992 |

Externally published | Yes |