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Fabrication and electrolytic conduction of single conical nanopores
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Single conical nanopores were fabricated by etching single-ion-irradiated polymer (ethylene terephthalate) (PET) films. The etching process was monitored by measuring the transmembrane current. A series of conical nanopores with different tip sizes were obtained at different maximum etching currents, "Imax". Results showed that it was possible to control the tip diameter by terminating etching at a certain Imax. The current-voltage characteristic of the nanopores in KCl solution was investigated. Results showed also that the ionic conduction was asymmetrical, this phenomenon is called rectification. The current rectification coefficient, was influenced by the tip size and electrolyte concentration.
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Title: Fabrication and electrolytic conduction of single conical nanopores
Description:
Single conical nanopores were fabricated by etching single-ion-irradiated polymer (ethylene terephthalate) (PET) films.
The etching process was monitored by measuring the transmembrane current.
A series of conical nanopores with different tip sizes were obtained at different maximum etching currents, "Imax".
Results showed that it was possible to control the tip diameter by terminating etching at a certain Imax.
The current-voltage characteristic of the nanopores in KCl solution was investigated.
Results showed also that the ionic conduction was asymmetrical, this phenomenon is called rectification.
The current rectification coefficient, was influenced by the tip size and electrolyte concentration.
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