Electrodiffusiophoretic Motion of a Charged Spherical Particle in a Nanopore

Title
Electrodiffusiophoretic Motion of a Charged Spherical Particle in a Nanopore
Author(s)
스즈첸에렌얄신[에렌얄신]주상우이상윤[이상윤]Oktay Baysal[Oktay Baysal]
Keywords
ELECTRIC SURFACE PHENOMENA; DOUBLE-LAYER THICKNESS; SOLID-STATE NANOPORES; 2 PLANE WALLS; ELECTROPHORETIC MOTION; CYLINDRICAL PARTICLES; DNA TRANSLOCATION; COLLOIDAL SPHERE; DIFFUSIOPHORESIS; NANOFLUIDICS
Issue Date
201003
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY B, v.114, no.11, pp.4082 - 4093
Abstract
The electrodiffusiophoretic motion of a charged spherical nanoparticle in a nanopore subjected to Ill axial electric field and electrolyte concentration gradient has been investigated using a continuum model, composed of the Poisson-Nernst-Planck equations for the ionic mass transport and the Navier-Stokes equations for the flow field. The charged particle experiences electrophoresis ill response to the imposed electric field and diffusiophoresis caused solely by the imposed concentration gradient. The diffusiophoretic motion is induced by two different mechanisms, in electrophoresis driven by the generated electric field arising front the difference of ionic diffusivities and the double layer polarization and a chemiphoresis due to the induced osmotic pressure gradient around the charged nanoparticle. The electrodiffusiophoretic motion along the axis of a nartopore is investigated as a function of the ratio of the particle size to the thickness of the electrical double layer, the imposed concentration gradient, the ratio of the surface charge density of the nanopore to that of the particle, and the type of electrolyte. Depending Oil the mangnitude and direction of the imposed concentration gradient, one call accelerate, decelerate, and even reverse the particle's electrophoretic motion in a nanopore by the superimposed diffusiophoresis. The induced electroosmotic flow in the vicinity of the charged nanopore wall driven by both the imposed and the generated electric fields also significantly affects the electrodiffusiophoretic motion.
URI
http://hdl.handle.net/YU.REPOSITORY/22760http://dx.doi.org/10.1021/jp100784p
ISSN
1520-6106
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공과대학 > 기계공학부 > Articles
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