Nanotribology of protic ionic liquids: Green lubricants for micro-/nano-electromechanical devices

Emily D. Cranston, Oliver Werzer, Rubén Álvarez, Rob Atkin, Mark W. Rutland

Research output: Contribution to conferenceAbstract

3 Citations (Scopus)

Abstract

The negligible vapor pressure and friction-reducing abilities of ionic liquids make them ideal candidates as green lubricants. Here we show that ethylammonium nitrate (EAN), a room-temperature ionic liquid, significantly alters energy dissipation between surfaces. Colloidal-probe atomic force microscopy was used to study nano-scale friction between silica, mica, alumina and teflon. Fundamental investigations in a model system imply that three friction regimes exist at low applied loads which correspond to structured EAN layers being sheared. The onset of the regimes is rate dependant and hydrodynamics play a dominant role. For industrially relevant material combinations in EAN, bringing the surfaces together quickly resulted in strong repulsive forces and eliminated attractive forces (electrostatic, capillary, van der Waals) and adhesion, responsible for stiction/wear in miniaturized devices. Moreover, at fast rates and high loads both the friction magnitude and the friction coefficient were decreased in EAN, compared to measurements in air and aqueous solutions.

Original languageEnglish
Publication statusPublished - 2011
Externally publishedYes
Event241st National Meeting and Exposition of the American-Chemical-Society - Anaheim, United States
Duration: 27 Mar 201131 Mar 2011

Conference

Conference241st National Meeting and Exposition of the American-Chemical-Society
Abbreviated titleACS
CountryUnited States
CityAnaheim
Period27/03/1131/03/11

Fingerprint

Dive into the research topics of 'Nanotribology of protic ionic liquids: Green lubricants for micro-/nano-electromechanical devices'. Together they form a unique fingerprint.

Cite this