Asymmetric properties of ion current 1/f noise in conically shaped nanopores

被引：22

作者：

Powell, Matthew R. ^{[1
]}

Martens, Craig ^{[2
]}

Siwy, Zuzanna S. ^{[1
]}

机构：

[1] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[2] Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA

来源：

CHEMICAL PHYSICS | 2010年 / 375卷 / 2-3期

基金：

美国国家科学基金会;

关键词：

Nanopore; Power spectra; 1/f noise; Biosensing; CURRENT RECTIFICATION; TRANSPORT; MEMBRANE; MODEL;

D O I：

10.1016/j.chemphys.2010.06.008

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We study ion currents in single rectifying conically shaped nanopores of various opening diameters and analyze the 1/f spectral behavior of the current fluctuations. The 1/f noise characteristics show an asymmetry with respect to the externally applied voltage. When in the high conductance state, the normalized 1/f noise associated with ion current signals increases with applied voltage, while in the low conductance state the 1/f noise shows equilibrium, voltage-independent fluctuations. The pore diameter and salt concentration play a direct role in defining these noise properties and influence the frequency range of the 1/f noise occurrence. We describe this behavior for a range of nanopore diameters and electrolyte concentrations. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：529 / 535

页数：7

共 28 条

[1] Diode-like single-ion track membrane prepared by electro-stopping [J].

Apel, PY ;

Korchev, YE ;

Siwy, Z ;

Spohr, R ;

Yoshida, M .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2001, 184 (03) :337-346

[2] Thermodynamics and kinetics of a Brownian motor [J].

Astumian, RD .

SCIENCE, 1997, 276 (5314) :917-922

[3] Examining noise sources at the single-molecule level:: 1/f noise of an open maltoporin channel [J].

Bezrukov, SM ;

Winterhalter, M .

PHYSICAL REVIEW LETTERS, 2000, 85 (01) :202-205

[4] Ionic conduction, rectification, and selectivity in single conical nanopores [J].

Cervera, J ;

Schiedt, B ;

Neumann, R ;

Mafé, S ;

Ramírez, P .

JOURNAL OF CHEMICAL PHYSICS, 2006, 124 (10)

[5] A Poisson/Nernst-Planck model for ionic transport through synthetic conical nanopores [J].

Cervera, J ;

Schiedt, B ;

Ramírez, P .

EUROPHYSICS LETTERS, 2005, 71 (01) :35-41

[6] Atomic layer deposition to fine-tune the surface properties and diameters of fabricated nanopores [J].

Chen, P ;

Mitsui, T ;

Farmer, DB ;

Golovchenko, J ;

Gordon, RG ;

Branton, D .

NANO LETTERS, 2004, 4 (07) :1333-1337

[7] Ionic Current Rectification through Silica Nanopores [J].

Cruz-Chu, Eduardo R. ;

Aksimentiev, Aleksei ;

Schulten, Klaus .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (05) :1850-1862

[8]

Fleischer R. L., 1975, Nuclear Tracks in Solids: Principles and Applicaations

[9]

Haenggi P., 1996, Nonlinear physics of complex systems. Current status and future trends, P294

[10] Artificial Brownian motors: Controlling transport on the nanoscale [J].

Haenggi, Peter ;

Marchesoni, Fabio .

REVIEWS OF MODERN PHYSICS, 2009, 81 (01) :387-442

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