Conservative and Dissipative Interactions of Ionic Liquids in Nanoconfinement

James R.T. Seddon

doi:10.1021/jp508336e

Conservative and Dissipative Interactions of Ionic Liquids in Nanoconfinement

James R.T. Seddon

Faculty of Science and Technology

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

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.

Original language	English
Pages (from-to)	22197-22201
Journal	The Journal of physical chemistry C
Volume	118
Issue number	38
DOIs	https://doi.org/10.1021/jp508336e
Publication status	Published - 2014

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10.1021/jp508336e

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AB - 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.

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Conservative and Dissipative Interactions of Ionic Liquids in Nanoconfinement

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