Hsu J.-P.Liu K.-L.Tseng S.2019-05-202019-05-20201319327447https://scholars.lib.ntu.edu.tw/handle/123456789/409277Considering the potential applications of diffusiophoresis conducted in nanodevices, a thorough theoretical analysis is performed for the first time on the diffusiophoresis of a polyelectrolyte (PE) in the presence of two representative types of boundaries: the direction of diffusiophoresis is either normal (type I) or parallel (type II) to a boundary, using two large parallel disks and a cylindrical pore as an example, respectively. It is interesting to observe that due to the effects of double-layer polarization, counterion condensation, polarization of condensed counterions, and diffusion of co-ions across a PE, its diffusiophoretic behavior can be influenced both quantitatively (magnitude of mobility) and qualitatively (direction of diffusiophoresis) by a boundary. In general, type I (II) boundary raises the diffusiophoretic mobility of a PE toward the high (low) salt concentration side. The results gathered provide necessary information for applications in, for example, designing catalytic swimmers and nanopore-based biosensor devices. ? 2013 American Chemical Society.[SDGs]SDG14journal article10.1021/jp312702r2-s2.0-84877720690https://www.scopus.com/inward/record.uri?eid=2-s2.0-84877720690&doi=10.1021%2fjp312702r&partnerID=40&md5=e5bb853c375b5d350e86aa54937c182b