期刊
PHYSICAL REVIEW LETTERS
卷 103, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.103.248104
关键词
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资金
- National Science Foundation [CMMI 0825661]
- Alfred P. Sloan Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0825661] Funding Source: National Science Foundation
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.
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