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Nanoscopic Friction under Electrochemical Control
Stockholm University, Faculty of Science, Department of Physics.
2014 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 112, no 5, 055502- p.Article in journal (Refereed) Published
Abstract [en]

We propose a theoretical model of friction under electrochemical conditions focusing on the interaction of a force microscope tip with adsorbed polar molecules whose orientation depends on the applied electric field. We demonstrate that the dependence of friction force on the electric field is determined by the interplay of two channels of energy dissipation: (i) the rotation of dipoles and (ii) slips of the tip over potential barriers. We suggest a promising strategy to achieve a strong dependence of nanoscopic friction on the external field based on the competition between long-range electrostatic interactions and short-range chemical interactions between tip and adsorbed polar molecules.

Place, publisher, year, edition, pages
2014. Vol. 112, no 5, 055502- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-102077DOI: 10.1103/PhysRevLett.112.055502ISI: 000331949700014OAI: oai:DiVA.org:su-102077DiVA: diva2:708432
Funder
Swedish Research Council
Note

AuthorCount:4;

Available from: 2014-03-27 Created: 2014-03-26 Last updated: 2017-12-05Bibliographically approved

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