title: Diffusiophoresis of a charged toroidal polyelectrolyte.
abstract: Considering recent application of concentration driven motion of charged nanoparticles in sensing technology, we model the diffusiophoresis of an isolated toroidal polyelectrolyte (PE) for the first time. Choosing an aqueous KCl solution for illustration, its behavior under various conditions is simulated by varying the double layer thickness, the size of toroid, and its softness and fixed charge density. We show that the behavior of the present PE can be different both quantitatively and qualitatively from that of the corresponding spherical PE. This arises from the competition of the hydrodynamic force and the electric force acting on a PE. The geometry and the nature of a PE can also influence appreciably its behavior, yielding complicated and interesting results.
authors.affiliation: Department of Mathematics, Tamkang University, Tamsui, New Taipei City 25137, Taiwan. Electronic address: topology@mail.tku.edu.tw.
authors.forename: Shiojenn
authors.initials: S
authors.lastname: Tseng
authors.affiliation: Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
authors.forename: Yen-Rei
authors.initials: YR
authors.lastname: Hsu
authors.affiliation: Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan. Electronic address: jphsu@ntu.edu.tw.
authors.forename: Jyh-Ping
authors.initials: JP
authors.lastname: Hsu
keywords: Charged polyelectrolyte; Diffusiophoresis; Toroid