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Issue 45, 2015
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Rectification of nanopores in aprotic solvents – transport properties of nanopores with surface dipoles

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Abstract

Nanopores have become a model system to understand transport properties at the nanoscale. We report experiments and modeling of ionic current in aprotic solvents with different dipole moments through conically shaped nanopores in a polycarbonate film and through glass nanopipettes. We focus on solutions of the salt LiClO4, which is of great importance in modeling lithium based batteries. Results presented suggest ion current rectification observed results from two effects: (i) adsorption of Li+ ions to the pore walls, and (ii) a finite dipole moment rendered by adsorbed solvent molecules. Properties of surfaces in various solvents were probed by means of scanning ion conductance microscopy, which confirmed existence of an effectively positive surface potential in aprotic solvents with high dipole moments.

Graphical abstract: Rectification of nanopores in aprotic solvents – transport properties of nanopores with surface dipoles

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Publication details

The article was received on 14 Sep 2015, accepted on 21 Oct 2015 and first published on 22 Oct 2015


Article type: Paper
DOI: 10.1039/C5NR06340J
Author version available: Download Author version (PDF)
Citation: Nanoscale, 2015,7, 19080-19091
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    Rectification of nanopores in aprotic solvents – transport properties of nanopores with surface dipoles

    T. Plett, W. Shi, Y. Zeng, W. Mann, I. Vlassiouk, L. A. Baker and Z. S. Siwy, Nanoscale, 2015, 7, 19080
    DOI: 10.1039/C5NR06340J

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