Journal ArticleDOI
A Poisson/Nernst-Planck model for ionic transport through synthetic conical nanopores
TLDR
A theoretical model for ionic transport through synthetic conical nanopores obtained using the track-etching technique is presented in this paper, based on the Poisson and Nernst-Planck equations.Abstract:
A theoretical model for ionic transport through synthetic conical nanopores obtained using the track-etching technique is presented. The model is based on the Poisson and Nernst-Planck equations. The results provided by the theory are compared with recent experimental current-voltage curves obtained for polymeric membranes containing single, gold-coated conical nanopores. The calculated profiles of average concentration and electric potential along the pore symmetry axis allow for an intuitive explanation of the rectification properties observed in these systems.read more
Citations
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Journal ArticleDOI
Nanopore analytics: sensing of single molecules
Stefan Howorka,Zuzanna S. Siwy +1 more
TL;DR: In nanopore analytics, individual molecules pass through a single nanopore giving rise to detectable temporary blockades in ionic pore current, which ranges from nucleic acids, peptides, proteins, and biomolecular complexes to organic polymers and small molecules.
Journal ArticleDOI
Ion‐Current Rectification in Nanopores and Nanotubes with Broken Symmetry
Zuzanna S. Siwy,Zuzanna S. Siwy +1 more
TL;DR: In this paper, the effect of ion-current rectification is observed as asymmetric currentvoltage (I-V) curves, with the current recorded for one voltage polarity higher than the current for the same absolute value of voltage of opposite polarity.
Journal ArticleDOI
Engineered voltage-responsive nanopores
Zuzanna S. Siwy,Stefan Howorka +1 more
TL;DR: This critical review considers engineered solid-state and protein nanopores with voltage-responsive properties and shows nonlinear current-voltage curves, and/or voltage-dependent switching between discrete conductance states.
Journal ArticleDOI
Ionic conduction, rectification, and selectivity in single conical nanopores.
TL;DR: This work presents a detailed theoretical and experimental account of the effects of pore radii and electrolyte concentration on the current-voltage and current-concentration curves for nanopore fixed charges and mobile charges confined in the reduced volume of the inside solution.
Journal ArticleDOI
Ion current rectification at nanopores in glass membranes.
Henry S. White,Andreas Bund +1 more
TL;DR: The simulations demonstrate that current rectification is maximized at intermediate bulk ion concentrations, a combination of the electrical screening of surface charge at high concentrations and a fixed number of charge-carrying ions in the pore at lower concentration, which are physical conditions where the voltage dependence of the conductivity disappears.
References
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Journal ArticleDOI
Nanomaterials: a membrane-based synthetic approach.
TL;DR: A relatively new method for preparing nanomaterials, membrane-based synthesis, is reviewed, which entails synthesis of the desired material within the pores of a nanoporous membrane.
Journal ArticleDOI
Surface-charge-governed ion transport in nanofluidic channels.
TL;DR: Using chemical surface modifications, it is demonstrated that at low salt concentrations, ion transport in nanochannels is governed by the surface charge.
Journal ArticleDOI
Metal Nanotubule Membranes with Electrochemically Switchable Ion-Transport Selectivity
TL;DR: Membranes containing cylindrical metal nanotubules that span the complete thickness of the membrane are described, showing selective ion transport analogous to that observed in ion-exchange polymers.
Journal ArticleDOI
Diode-like single-ion track membrane prepared by electro-stopping
TL;DR: The prepn. of an asym. membrane in poly(ethylene terephthalate) (PET) is described, using a combination of chem. and electro-stopping as mentioned in this paper.
Journal ArticleDOI
Fabrication of a synthetic nanopore ion pump.
Zuzanna S. Siwy,A. Fuliński +1 more
TL;DR: A synthetic nanodevice, which transports potassium ions against their concentration gradient if stimulated with external field fluctuations, which consists of a single, conical pore created in a thin polyethylene terephthalate film.
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Ion‐Current Rectification in Nanopores and Nanotubes with Broken Symmetry
Zuzanna S. Siwy,Zuzanna S. Siwy +1 more