Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2009-02-20
Phys. Rev. Lett. 103, 128102 (2009)
Physics
Condensed Matter
Soft Condensed Matter
6 pages, 3 figures, updated to fix fonts
Scientific paper
10.1103/PhysRevLett.103.128102
Ionic transport in nanopores is a fundamentally and technologically important problem in view of its occurrence in biological processes and its impact on novel DNA sequencing applications. Using microscopic calculations, here we show that ion transport may exhibit strong nonlinearities as a function of the pore radius reminiscent of the conductance quantization steps as a function of the transverse cross section of quantum point contacts. In the present case, however, conductance steps originate from the break up of the hydration layers that form around ions in aqueous solution. Once in the pore, the water molecules form wavelike structures due to multiple scattering at the surface of the pore walls and interference with the radial waves around the ion. We discuss these effects as well as the conditions under which the step-like features in the ionic conductance should be experimentally observable.
Lagerqvist Johan
Ventra Massimiliano Di
Zwolak Michael
No associations
LandOfFree
Quantized ionic conductance in nanopores does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quantized ionic conductance in nanopores, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantized ionic conductance in nanopores will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-672088