Tuning the preferential direction of ion flow in asymmetric nanofluidic mediums

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dc.contributor.authorBakirci, M.
dc.contributor.authorGarren, R.
dc.date.accessioned2025-03-17T12:25:23Z
dc.date.available2025-03-17T12:25:23Z
dc.date.issued2024
dc.departmentTarsus Üniversitesi
dc.description.abstractCurrent rectification and electrokinetic flow properties in an asymmetric nanochannel in a thermoplastic polyurethane membrane were investigated experimentally and numerically. The nanochannel with a tip diameter of about 300 nm showed current rectification, which is evident only in nanochannels with much smaller tip radii (<100 nm), due to the surface properties of the thermoplastic polyurethane material. To elucidate the mechanism of current rectification, a mathematical model consisting of Nernst-Planck equations for the ionic mass transport, the Poisson's equation for electrostatics, and NavierStokes equations for flow field has been developed. Tt was verified that the obtained numerical results were in qualitative agreement with the experimental results obtained. Tt was concluded that due to the surface charge of the channel material, a significantly thick electric double layer was formed on the inner surface of the nanochannel in contact with the electrolyte, and this formed a gating mechanism because of overlapping electric double layers near the tip of the asymmetric nanochannel. Tt has been found that the applied concentration gradient is as effective as low applied potentials and thus can reverse the preferential direction of ion flow. (c) 2024 Sharif University of Technology. All rights reserved.
dc.identifier.doi10.24200/sci.2023.59514.6284
dc.identifier.endpage934
dc.identifier.issn1026-3098
dc.identifier.issue12
dc.identifier.scopus2-s2.0-85203802853
dc.identifier.scopusqualityQ2
dc.identifier.startpage920
dc.identifier.urihttps://doi.org/10.24200/sci.2023.59514.6284
dc.identifier.urihttps://hdl.handle.net/20.500.13099/1642
dc.identifier.volume31
dc.identifier.wosWOS:001292801300002
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSharif Univ Technology
dc.relation.ispartofScientia Iranica
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20250316
dc.subjectElectrokinetic flow
dc.subjectThermoplastic
dc.subjectCurrent rectification
dc.subjectNanochannel
dc.subjectContinuum model
dc.titleTuning the preferential direction of ion flow in asymmetric nanofluidic mediums
dc.typeArticle

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