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Phys Rev Lett. 2013 Dec 13;111(24):248301. doi: 10.1103/PhysRevLett.111.248301. Epub 2013 Dec 12.

Escape of DNA from a weakly biased thin nanopore: experimental evidence for a universal diffusive behavior.

Physical review letters

David P Hoogerheide, Fernando Albertorio, Jene A Golovchenko

Affiliations

  1. Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
  2. Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA and School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA.

PMID: 24483704 PMCID: PMC4085674 DOI: 10.1103/PhysRevLett.111.248301

Abstract

We report experimental escape time distributions of double-stranded DNA molecules initially threaded halfway through a thin solid-state nanopore. We find a universal behavior of the escape time distributions consistent with a one-dimensional first passage formulation notwithstanding the geometry of the experiment and the potential role of complex molecule-liquid-pore interactions. Diffusion constants that depend on the molecule length and pore size are determined. Also discussed are the practical implications of long time diffusive molecule trapping in the nanopore.

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