Please use this identifier to cite or link to this item: doi:10.22028/D291-30073
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Title: Molecular Rheology of a Nanometer-Confined Ionic Liquid
Author(s): Krämer, Günther
Bennewitz, Roland
Language: English
Title: Journal of Physical Chemistry C : Nanomaterials and Interfaces
Volume: 123
Issue: 46
Startpage: 28284
Endpage: 28290
Publisher/Platform: American Chemical Society (ACS)
Year of Publication: 2019
Publikation type: Journal Article
Abstract: Molecular mechanisms in the shear of an ionicvliquid in nanometer-scale confinement were investigated by atomic force microscopy with a laterally oscillating tip. On a single-crystal gold electrode, the ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][NTf2]) exhibits molecular ordering in a simple cubic structure upon confinement by the nanometer-sized asperity. The strength of shear resistance decreases exponentially with increasing number of confined molecular layers.The dependence of lateral forces and of dissipation on the applied electrochemical potential confirms a mechanism in theelectrolubrication by ionic liquids, namely, the change of the slippage plane from the interface with the electrode into the ionic liquid for increasing surface potential.
DOI of the first publication: 10.1021/acs.jpcc.9b09058
URL of the first publication:
Link to this record: hdl:20.500.11880/28504
ISSN: 1932-7455
Date of registration: 18-Dec-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Physik
Professorship: NT - Keiner Professur zugeordnet
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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