Electrolyte transport in charged single ion track capillaries

Wolf, A.; Reber, N.; Apel, P.Yu.; Fischer, B.; Spohr, R.

doi:10.1016/0168-583x(95)00577-3

Cited by 60 publications

(50 citation statements)

References 4 publications

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“…This discrepancy might be due to the special surface charge layer on the track-etched nanopores, which is composed of danglings of polymer induced by chemical etching. [15][16][17] Anyway, further study is needed to clarify this discrepancy.…”

mentioning

confidence: 82%

Electric energy generation in single track-etched nanopores

Xie¹,

Wang²,

Xue³

et al. 2008

Applied Physics Letters

120

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We investigated the efficiency of electrical power generation in single track-etched nanopores by measuring the streaming currents and conductance. Experimental results indicate that both the efficiency and output power depend on the electrolyte concentration and the dimension of the pore. The highest efficiency of 5% was obtained in nanopores with small radii of 31 nm. The surface property of the track-etched nanopores was found very important to the kinetic-electric behaviors in the pores, especially when the electrolyte concentration was low.

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mentioning

confidence: 82%

Electric energy generation in single track-etched nanopores

Xie¹,

Wang²,

Xue³

et al. 2008

Applied Physics Letters

120

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“…Some of these broken polymer molecules had charged dangling bonds, which are the source of surface charges on the track-etched nanopore. 24,25 The structure of this gel-like layer is illustrated in Fig. 4.…”

Section: Resultsmentioning

confidence: 99%

Surface charge density of the track-etched nanopores in polyethylene terephthalate foils

Xue

Xie

et al. 2009

Biomicrofluidics

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Surface charge is one of the most important properties of nanopores, which determines the nanopore performance in many practical applications. We report the surface charge densities of track-etched nanopores, which were obtained by measuring the streaming current and pore conductance, respectively. Experimental results reveal that surface charge densities depend significantly on the salt concentrations. In addition the values obtained with the pore conductance were always several times higher than those calculated with the streaming current, and the gel-like surface layer on the nanopore was considered to be responsible for this discrepancy.

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“…We presume that this zero-conductivity region is related to the presence of so-called dangling ends of the polymer chains, which are created on pore walls during the fabrication process, i.e., during irradiation with heavy ions and etching with sodium hydroxide. [11,23,26] It is not known how long the dangling ends are, but even if they consist of just one building block of PET, their length would be ∼ 1 nm. The polymer ends have carboxylate groups; therefore, they can respond to electric fields, [9] changing the effective diameter of the pore and even closing it.…”

Section: Current-voltage Curves Of Double-conical Nanoporesmentioning

confidence: 99%

Ion-Current Rectification in Nanopores and Nanotubes with Broken Symmetry

2006

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This article focuses on ion transport through nanoporous systems with special emphasis on rectification phenomena. The effect of ion‐current rectification is observed as asymmetric current–voltage (I–V) curves, with the current recorded for one voltage polarity higher than the current recorded for the same absolute value of voltage of opposite polarity. This diode‐like I–V curve indicates that there is a preferential direction for ion flow. Experimental evidence that ion‐current rectification is inherent to asymmetric, e.g., tapered, nanoporous systems with excess surface charge is provided and discussed. The fabrication and operation of asymmetric polymer nanopores, gold nanotubes, glass nanocapillaries, and silicon nanopores are presented. The possibility of tuning the direction and extent of rectification is discussed in detail. Theoretical models that have been developed to explain the ion‐current rectification effect are also presented.

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Electrolyte transport in charged single ion track capillaries

Cited by 60 publications

References 4 publications

Electric energy generation in single track-etched nanopores

Electric energy generation in single track-etched nanopores

Surface charge density of the track-etched nanopores in polyethylene terephthalate foils

Ion-Current Rectification in Nanopores and Nanotubes with Broken Symmetry

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