title: Stochastic transport of particles across single barriers.
abstract: Transport phenomena of interacting particles are of high interest for many applications in biology and mesoscopic systems. Here we present measurements on colloidal particles, which are confined in narrow channels on a substrate and interact with a barrier, which impedes the motion along the channel. The substrate of the particle is tilted in order for the particles to be driven towards the barrier and, if the energy gained by the tilt is large enough, surpass the barrier by thermal activation. We therefore study the influence of this barrier as well as the influence of particle interaction on the particle transport through such systems. All experiments are supported with Brownian dynamics simulations in order to complement the experiments with tests of a large range of parameter space which cannot be accessed in experiments.
authors.affiliation: Fachbereich Physik, Universität Konstanz, D-78457 Konstanz, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Kreuter
authors.forename: Ullrich
authors.initials: U
authors.lastname: Siems
authors.forename: Peter
authors.initials: P
authors.lastname: Henseler
authors.forename: Peter
authors.initials: P
authors.lastname: Nielaba
authors.forename: Paul
authors.initials: P
authors.lastname: Leiderer
authors.forename: Artur
authors.initials: A
authors.lastname: Erbe
mesh_terms: D003102:Colloids; D004129:Dimethylpolysiloxanes / Q000737:chemistry; D059346:Magnets / Q000737:chemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D009038:Motion; D013269:Stochastic Processes
chemical_list: D003102:Colloids; D004129:Dimethylpolysiloxanes; C013830:baysilon