title: Nonequilibrium 1/f noise in rectifying nanopores.
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.
authors.affiliation: Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697, USA.
authors.forename: Matthew R
authors.initials: MR
authors.lastname: Powell
authors.forename: Ivan
authors.initials: I
authors.lastname: Vlassiouk
authors.forename: Craig
authors.initials: C
authors.lastname: Martens
authors.forename: Zuzanna S
authors.initials: ZS
authors.lastname: Siwy
mesh_terms: 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
chemical_list: D011093:Polyethylene Terephthalates