title: Ionic Transport through Chemically Functionalized Hydrogen Peroxide-Sensitive Asymmetric Nanopores.
abstract: We describe the fabrication of a chemical-sensitive nanofluidic device based on asymmetric nanopores whose transport characteristics can be modulated upon exposure to hydrogen peroxide (H2O2). We show experimentally and theoretically that the current-voltage curves provide a suitable method to monitor the H2O2-mediated change in pore surface characteristics from the electronic readouts. We demonstrate also that the single pore characteristics can be scaled to the case of a multipore membrane whose electric outputs can be readily controlled. Because H2O2 is an agent significant for medical diagnostics, the results should be useful for sensing nanofluidic devices.
authors: Department of Material- and Geo-Sciences, Materials Analysis, Technische Universität Darmstadt , D-64287 Darmstadt, Germany.|Materialforschung, GSI Helmholtzzentrum für Schwerionenforschung , D-64291 Darmstadt, Germany.
authors: Mubarak
authors: M
authors: Ali
authors: Institute for Biological Interfaces (IBG-1), Karlsruhe Institute of Technology (KIT) , Hermann-von-Helmholtz-Platz, D-76344 Eggenstein-Leopoldshafen, Germany.
authors: Ishtiaq
authors: I
authors: Ahmed
authors: Department of Material- and Geo-Sciences, Materials Analysis, Technische Universität Darmstadt , D-64287 Darmstadt, Germany.|Materialforschung, GSI Helmholtzzentrum für Schwerionenforschung , D-64291 Darmstadt, Germany.
authors: Saima
authors: S
authors: Nasir
authors: Departament de Física Aplicada, Universitat Politécnica de València , E-46022 València, Spain.
authors: Patricio
authors: P
authors: Ramirez
authors: Institute for Biological Interfaces (IBG-1), Karlsruhe Institute of Technology (KIT) , Hermann-von-Helmholtz-Platz, D-76344 Eggenstein-Leopoldshafen, Germany.
authors: Christof M
authors: CM
authors: Niemeyer
authors: Departament de Física de la Terra i Termodinàmica, Universitat de València , E-46100 Burjassot, Spain.
authors: Salvador
authors: S
authors: Mafe
authors: Department of Material- and Geo-Sciences, Materials Analysis, Technische Universität Darmstadt , D-64287 Darmstadt, Germany.
authors: Wolfgang
authors: W
authors: Ensinger
mesh_terms: D000588:Amines / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D017136:Ion Transport; D007477:Ions / Q000737:chemistry; D008962:Models, Theoretical; D058608:Nanopores; D011093:Polyethylene Terephthalates / Q000737:chemistry; D013499:Surface Properties
chemical_list: D000588:Amines; D007477:Ions; D011093:Polyethylene Terephthalates; D006861:Hydrogen Peroxide
keywords: H2O2-sensitive pore; Nernst−Planck equations; asymmetric nanopores; chemical functionalization; current rectification