Nonequilibrium 1/f noise in rectifying nanopores.
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.
Powell
Matthew R
MR
Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697, USA.
Vlassiouk
Ivan
I
Martens
Craig
C
Siwy
Zuzanna S
ZS
D004560:Electricity; D049329:Nanostructures / Q000737:chemistry*; D009716:Numerical Analysis, Computer-Assisted; D011093:Polyethylene Terephthalates / Q000737:chemistry; D016062:Porosity; D013057:Spectrum Analysis; D055672:Static Electricity; D013997:Time Factors
D011093:Polyethylene Terephthalates