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Condensed Matter > Soft Condensed Matter

arXiv:cond-mat/0604148 (cond-mat)
[Submitted on 5 Apr 2006 (v1), last revised 19 Jul 2006 (this version, v2)]

Title:Self-energy limited ion transport in sub-nanometer channels

Authors:Douwe Jan Bonthuis, Jingshan Zhang, Breton Hornblower, Jerome Mathe, Boris I. Shklovskii, Amit Meller
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Abstract: The current-voltage characteristics of the alpha-Hemolysin protein pore during the passage of single-stranded DNA under varying ionic strength, C, are studied experimentally. We observe strong blockage of the current, weak super-linear growth of the current as a function of voltage, and a minimum of the current as a function of C. These observations are interpreted as the result of the ion electrostatic self-energy barrier originating from the large difference in the dielectric constants of water and the lipid bilayer. The dependence of DNA capture rate on C also agrees with our model.
Comments: more experimental material is added. 4 pages, 7 figures
Subjects: Soft Condensed Matter (cond-mat.soft); Subcellular Processes (q-bio.SC)
Cite as: arXiv:cond-mat/0604148 [cond-mat.soft]
  (or arXiv:cond-mat/0604148v2 [cond-mat.soft] for this version)
  https://doi.org/10.48550/arXiv.cond-mat/0604148
Journal reference: Phys. Rev. Lett. 97, 128104 (2006)
Related DOI: https://doi.org/10.1103/PhysRevLett.97.128104

Submission history

From: Jingshan Zhang [view email]
[v1] Wed, 5 Apr 2006 22:59:12 UTC (260 KB)
[v2] Wed, 19 Jul 2006 16:04:46 UTC (303 KB)
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