title: Confocal zero-angle dynamic depolarized light scattering.
abstract: We present a novel Dynamic Depolarized Scattering method based on a tight confocal, zero scattering angle, heterodyne scheme. The method is highly immune from parasitic multiple-scattering contributions, so that it can operate with non-index-matched samples presenting large turbidity. It provides measurements of both rotational and translational diffusion coefficients, the latter via number fluctuation spectroscopy. In addition, the amplitude ratio between the two baselines for the fast rotational mode and the slow translational mode can be used to determine the particles intrinsic birefringence.
authors.affiliation: Dipartimento di Fisica, Università di Milano, Italy. marco.potenza@unimi.it
authors.forename: M A C
authors.initials: MA
authors.lastname: Potenza
authors.forename: T
authors.initials: T
authors.lastname: Sanvito
authors.forename: M D
authors.initials: MD
authors.lastname: Alaimo
authors.forename: V
authors.initials: V
authors.lastname: Degiorgio
authors.forename: M
authors.initials: M
authors.lastname: Giglio
mesh_terms: D016880:Anisotropy; D003102:Colloids / Q000737:chemistry; D004058:Diffusion; D008027:Light; D046911:Macromolecular Substances / Q000737:chemistry; D056004:Molecular Dynamics Simulation; D009391:Nephelometry and Turbidimetry; D012399:Rotation; D012542:Scattering, Radiation; D012997:Solvents / Q000737:chemistry
chemical_list: D003102:Colloids; D046911:Macromolecular Substances; D012997:Solvents