Discrete Electrolytes Research

Liquid ionics beyond Poisson-Boltzmann

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Publications: 2014

28.

J.R.T. Seddon
"Conservative and dissipative interactions of ionic liquids in nanoconfinement"
J. Phys. Chem. C 118, 22197 (2014)

By applying a small-amplitude (~200 pm) oscillation to an atomic force microscopy probe during force−distance spectroscopy we are able to separate the “resistance to squeeze” of an ionic liquid nanoconfined between the probe and a mica sheet into its conservative and dissipative components. The interaction stiffness of the ionic liquid increases to a solid-like value as the mica is approached, while the “effective local viscosity” dramatically increases above the bulk value due to adjacent layers of ion-pairs interlocking as they slide over each other.