Nonequilibrium 1/f noise in rectifying nanopores

Matthew R. Powell; Ivan Vlassiouk; Craig Martens; Zuzanna S. Siwy

doi:10.1103/PhysRevLett.103.248104

Nonequilibrium 1/f noise in rectifying nanopores

Matthew R. Powell, Ivan Vlassiouk, Craig Martens, Zuzanna S. Siwy

Functional Hybrid Nanomaterials

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59 Scopus citations

Abstract

We report a single rectifying conically shaped nanopore system with ion current fluctuations whose 1/f noise characteristics observed at low frequencies are voltage dependent. Switching the voltage polarity allows one to switch between a system that produces equilibrium and nonequilibrium 1/f ion current fluctuations. The nonequilibrium fluctuations in the high-conductance state of the device are characterized by exponential dependence of the normalized power spectrum on voltage. The asymmetric 1/f noise is found characteristic for rectifying polymer nanopores and absent in pores with Ohmic current-voltage curves.

Original language	English
Article number	248104
Journal	Physical Review Letters
Volume	103
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevLett.103.248104
State	Published - Dec 9 2009

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10.1103/PhysRevLett.103.248104

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Nonequilibrium 1/f noise in rectifying nanopores

Abstract

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