@article{4dee792c567a4f1c8b571a9ebb7f0c3f,
title = "Electrotunable Lubricity with Ionic Liquid Nanoscale Films",
abstract = "One of the main challenges in tribology is finding the way for an in situ control of friction without changing the lubricant. One of the ways for such control is via the application of electric fields. In this respect a promising new class of lubricants is ionic liquids, which are solvent-free electrolytes, and their properties should be most strongly affected by applied voltage. Based on a minimal physical model, our study elucidates the connection between the voltage effect on the structure of the ionic liquid layers and their lubricating properties. It reveals two mechanisms of variation of the friction force with the surface charge density, consistent with recent AFM measurements, namely via the (i) charge effect on normal and in-plane ordering in the film and (ii) swapping between anion and cation layers at the surfaces. We formulate conditions that would warrant low friction coefficients and prevent wear by resisting 'squeezing-out' of the liquid under compression. These results give a background for controllable variation of friction.",
author = "Fajardo, {O. Y.} and F. Bresme and Kornyshev, {A. A.} and M. Urbakh",
note = "Funding Information: The authors are thankful to Susan Perkin and Tom Welton for valuable discussions. O.Y.F. acknowledges financial support from the TAU Center for Nanoscience and Nanotechnology. FB acknowledges the financial support from EPSRC (EP/J003859/1) and the award of an EPSRC Leadership Fellowship. M.U. acknowledges the financial support of the Israel Science Foundation, Grant No. 1316/13, and the German-Israeli Project Cooperation Program (DIP). M.U. and O.Y.F. acknowledge the support of COST Action MP1303.",
year = "2015",
month = jan,
day = "9",
doi = "10.1038/srep07698",
language = "אנגלית",
volume = "5",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
}