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

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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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Article information

18 Aug 2011
26 Oct 2011
First published
09 Nov 2011

Soft Matter, 2012,8, 289-293
Article type

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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