Electromigration current rectification in a cylindrical nanopore due to asymmetric concentration polarization

Jung Yeul Jung; Punarvasu Joshi; Leo Petrossian; Trevor Thornton; Jonathan D. Posner

doi:10.1021/ac900318j

Electromigration current rectification in a cylindrical nanopore due to asymmetric concentration polarization

Jung Yeul Jung, Punarvasu Joshi, Leo Petrossian, Trevor Thornton, Jonathan D. Posner

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60 Scopus citations

Abstract

We present experimental measurements of electromigra-tion current through a single cylindrical nanopore. A single cylindrical nanopore with 175 nm diameter was fabricated in silicon in series with two micropores with 2 and 100 μm diameters. Thick electrical double layers (EDLs) (Ka ≈ 1) exhibit current rectification due to asymmetric concentration polarization while thinner EDLs show nearly symmetric conductance. After the electric field is turned off, electrical current is measured and observed due to redistribution of ions in the concentration polarization layer.

Original language	English (US)
Pages (from-to)	3128-3133
Number of pages	6
Journal	Analytical Chemistry
Volume	81
Issue number	8
DOIs	https://doi.org/10.1021/ac900318j
State	Published - Apr 15 2009

ASJC Scopus subject areas

Analytical Chemistry

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abstract = "We present experimental measurements of electromigra-tion current through a single cylindrical nanopore. A single cylindrical nanopore with 175 nm diameter was fabricated in silicon in series with two micropores with 2 and 100 μm diameters. Thick electrical double layers (EDLs) (Ka ≈ 1) exhibit current rectification due to asymmetric concentration polarization while thinner EDLs show nearly symmetric conductance. After the electric field is turned off, electrical current is measured and observed due to redistribution of ions in the concentration polarization layer.",

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AU - Jung, Jung Yeul

AU - Joshi, Punarvasu

AU - Petrossian, Leo

AU - Thornton, Trevor

AU - Posner, Jonathan D.

PY - 2009/4/15

Y1 - 2009/4/15

N2 - We present experimental measurements of electromigra-tion current through a single cylindrical nanopore. A single cylindrical nanopore with 175 nm diameter was fabricated in silicon in series with two micropores with 2 and 100 μm diameters. Thick electrical double layers (EDLs) (Ka ≈ 1) exhibit current rectification due to asymmetric concentration polarization while thinner EDLs show nearly symmetric conductance. After the electric field is turned off, electrical current is measured and observed due to redistribution of ions in the concentration polarization layer.

AB - We present experimental measurements of electromigra-tion current through a single cylindrical nanopore. A single cylindrical nanopore with 175 nm diameter was fabricated in silicon in series with two micropores with 2 and 100 μm diameters. Thick electrical double layers (EDLs) (Ka ≈ 1) exhibit current rectification due to asymmetric concentration polarization while thinner EDLs show nearly symmetric conductance. After the electric field is turned off, electrical current is measured and observed due to redistribution of ions in the concentration polarization layer.

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JF - Analytical Chemistry

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Electromigration current rectification in a cylindrical nanopore due to asymmetric concentration polarization

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