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Current rectification by nanoparticle blocking in single cylindrical nanopores

Ali, Mubarak ; Ramirez, Patricio ; Nasir, Saima ; Nguyen, Quoc-Hung ; Ensinger, Wolfgang ; Mafe, Salvador :
Current rectification by nanoparticle blocking in single cylindrical nanopores.
[Online-Edition: http://pubs.rsc.org/en/content/articlelanding/2014/nr/c4nr02...]
In: Nanoscale, 6 (18) pp. 10740-10745.
[Artikel], (2014)

Offizielle URL: http://pubs.rsc.org/en/content/articlelanding/2014/nr/c4nr02...

Kurzbeschreibung (Abstract)

Blocking of a charged pore by an oppositely charged nanoparticle can support rectifying properties in a cylindrical nanopore, as opposed to the usual case of a fixed asymmetry in the pore geometry and charge distribution. We present here experimental data and model calculations to confirm this fundamental effect. The nanostructure imaging and the effects of nanoparticle concentration, pore radius, and salt concentration on the electrical conductance-voltage (G-V) curves are discussed. Logic responses based on chemical and electrical inputs/outputs could also be implemented with a single pore acting as an effective nanofluidic diode. To better show the generality of the results, different charge states and relative sizes of the nanopore and the nanoparticle are considered, emphasizing those physical concepts that are also found in the ionic drug blocking of protein ion channels.

Typ des Eintrags: Artikel
Erschienen: 2014
Autor(en): Ali, Mubarak ; Ramirez, Patricio ; Nasir, Saima ; Nguyen, Quoc-Hung ; Ensinger, Wolfgang ; Mafe, Salvador
Titel: Current rectification by nanoparticle blocking in single cylindrical nanopores
Sprache: Englisch
Kurzbeschreibung (Abstract):

Blocking of a charged pore by an oppositely charged nanoparticle can support rectifying properties in a cylindrical nanopore, as opposed to the usual case of a fixed asymmetry in the pore geometry and charge distribution. We present here experimental data and model calculations to confirm this fundamental effect. The nanostructure imaging and the effects of nanoparticle concentration, pore radius, and salt concentration on the electrical conductance-voltage (G-V) curves are discussed. Logic responses based on chemical and electrical inputs/outputs could also be implemented with a single pore acting as an effective nanofluidic diode. To better show the generality of the results, different charge states and relative sizes of the nanopore and the nanoparticle are considered, emphasizing those physical concepts that are also found in the ionic drug blocking of protein ion channels.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Nanoscale
Band: 6
(Heft-)Nummer: 18
Fachbereich(e)/-gebiet(e): Fachbereich Material- und Geowissenschaften > Materialwissenschaften
Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Materialanalytik
Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 25 Aug 2014 14:32
Offizielle URL: http://pubs.rsc.org/en/content/articlelanding/2014/nr/c4nr02...
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