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Issue 2, 2012
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Enhanced charge transport in nano-confined ionic liquids

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Abstract

Charge transport in ionic liquids contained in unidirectional nanoporous membranes (pore diameters: 7.5–10.4 nm) is investigated by combining broadband dielectric spectroscopy (BDS) and pulsed field gradient (PFG)-NMR. This enables one to determine the diffusion coefficient and the diffusion rate over more than 13 decades and to trace its temperature dependence. Under conditions of nanometric confinement, a change from a Vogel–Fulcher–Tammann into an Arrhenius-like thermal activation is observed, resulting in an enhancement of diffusivities by more than two orders of magnitude. The effect becomes more pronounced with decreasing pore diameter. It is attributed to changes in molecular packing and hence in density leading to higher mobility and electrical conductivity.

Graphical abstract: Enhanced charge transport in nano-confined ionic liquids

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Publication details

The article was received on 18 Aug 2011, accepted on 26 Oct 2011 and first published on 09 Nov 2011


Article type: Communication
DOI: 10.1039/C1SM06581E
Citation: Soft Matter, 2012,8, 289-293
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    Enhanced charge transport in nano-confined ionic liquids

    C. Iacob, J. R. Sangoro, W. K. Kipnusu, R. Valiullin, J. Kärger and F. Kremer, Soft Matter, 2012, 8, 289
    DOI: 10.1039/C1SM06581E

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