title: Study of translational and rotational dynamics of birefringent colloidal particles by depolarized light scattering in the far- and near-field regimes.
abstract: We characterize the translational and rotational dynamics of birefringent spherical colloidal particles by depolarized light scattering in the far- and near-field regimes. For this purpose, we use depolarized dynamic light scattering and propose an extension of dynamic heterodyne near-field light scattering that takes into account the polarization state of the light. Such a combination of methods allows to access colloidal dynamics in an extended q-range and permits to evaluate different modes of particles motion in suspension. Furthermore, we obtain a good agreement between results from the far- and near-field approaches thus validating our proposal and opening the possibility to investigate simultaneously the subtle interplay between translational and rotational motions of anisotropic colloidal particles in length-scales from the order of the particle size to several interparticle distances.
authors.affiliation: Departamento de Física, CINVESTAV-IPN, Av. Instituto Politécnico Nacional 2508, 07360 México D.F, Mexico.
authors.forename: Manuel A
authors.initials: MA
authors.lastname: Escobedo-Sánchez
authors.affiliation: Programa de Doctorado en Nanociencias y Nanotecnología, CINVESTAV-IPN, Av. Instituto Politécnico Nacional 2508, 07360 México D.F, Mexico.
authors.forename: Hugo A
authors.initials: HA
authors.lastname: De la Cruz-Burelo
authors.affiliation: Instituto de Física "Manuel Sandoval Vallarta", Universidad Autónoma de San Luis Potosí, Álvaro Obregón 64, 78000 San Luis Potosí, S.L.P., Mexico.
authors.forename: José L
authors.initials: JL
authors.lastname: Arauz-Lara
authors.affiliation: Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana-Azcapotzalco, Av. San Pablo 180, 02200 México D.F., Mexico.
authors.forename: Catalina
authors.initials: C
authors.lastname: Haro-Pérez
authors.affiliation: Departamento de Física, CINVESTAV-IPN, Av. Instituto Politécnico Nacional 2508, 07360 México D.F, Mexico.
authors.forename: Luis F
authors.initials: LF
authors.lastname: Rojas-Ochoa
mesh_terms: D016880:Anisotropy; D001669:Biochemical Phenomena; D003102:Colloids / Q000737:chemistry*; D004058:Diffusion; D008027:Light; D010316:Particle Size; D012399:Rotation; D012542:Scattering, Radiation
chemical_list: D003102:Colloids