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Current rectification by nanoparticle blocking in single cylindrical nanopores

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

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.

Item Type: Article
Erschienen: 2014
Creators: Ali, Mubarak and Ramirez, Patricio and Nasir, Saima and Nguyen, Quoc-Hung and Ensinger, Wolfgang and Mafe, Salvador
Title: Current rectification by nanoparticle blocking in single cylindrical nanopores
Language: English
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.

Journal or Publication Title: Nanoscale
Volume: 6
Number: 18
Divisions: 11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences
Date Deposited: 25 Aug 2014 14:32
Official URL: http://pubs.rsc.org/en/content/articlelanding/2014/nr/c4nr02...
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