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Nanoparticle-induced rectification in a single cylindrical nanopore: Net currents from zero time-average potentials

Ali, Mubarak ; Ramirez, Patricio ; Nasir, Saima ; Nguyen, Quoc-Hung ; Ensinger, Wolfgang ; Mafe, Salvador :
Nanoparticle-induced rectification in a single cylindrical nanopore: Net currents from zero time-average potentials.
[Online-Edition: http://dx.doi.org/10.1063/1.4863511]
In: Applied Physics Letters, 104 (4) 043703. ISSN 0003-6951
[Artikel], (2014)

Offizielle URL: http://dx.doi.org/10.1063/1.4863511

Kurzbeschreibung (Abstract)

Rectification in nanopores is usually achieved by a fixed asymmetry in the pore geometry and charge distribution. We show here that nanoparticle blocking of a cylindrical pore induces rectifying properties that can support significant net currents with zero time-average potentials. To describe experimentally this effect, the steady-state current-voltage curves of a single nanopore are obtained for different charge states and relative sizes of the pore and the charged nanoparticles, which are present only on one side. The rectification phenomena observed can find applications in the area of nanofluidics and involves physical concepts that are also characteristic of the blocking of protein ion channels by ionic drugs.

Typ des Eintrags: Artikel
Erschienen: 2014
Autor(en): Ali, Mubarak ; Ramirez, Patricio ; Nasir, Saima ; Nguyen, Quoc-Hung ; Ensinger, Wolfgang ; Mafe, Salvador
Titel: Nanoparticle-induced rectification in a single cylindrical nanopore: Net currents from zero time-average potentials
Sprache: Englisch
Kurzbeschreibung (Abstract):

Rectification in nanopores is usually achieved by a fixed asymmetry in the pore geometry and charge distribution. We show here that nanoparticle blocking of a cylindrical pore induces rectifying properties that can support significant net currents with zero time-average potentials. To describe experimentally this effect, the steady-state current-voltage curves of a single nanopore are obtained for different charge states and relative sizes of the pore and the charged nanoparticles, which are present only on one side. The rectification phenomena observed can find applications in the area of nanofluidics and involves physical concepts that are also characteristic of the blocking of protein ion channels by ionic drugs.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Applied Physics Letters
Band: 104
(Heft-)Nummer: 4
Verlag: AIP Publishing
Freie Schlagworte: Nanoparticles, Rectification, Nanoporous materials, Charged currents, Ion channels, Electroosmosis, Nanofluidics, Electrolytes, Electrical properties, Electrostatics
Fachbereich(e)/-gebiet(e): Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Materialanalytik
Fachbereich Material- und Geowissenschaften > Materialwissenschaften
Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 31 Jan 2014 09:50
Offizielle URL: http://dx.doi.org/10.1063/1.4863511
ID-Nummer: 10.1063/1.4863511
Sponsoren: M.A., S.N., Q.H.N., and W.E. acknowledge the Beilstein-Institut, Frankfurt/Main, Germany, within the research collaboration NanoBiC. , P.R. and S.M. acknowledge the Ministry of Economy and Competitiveness (project MAT2012-32084) and the Generalitat Valenciana (project PROMETEO/GV/0069).
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