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

Nanotribology
Electromechanical devices
Ionic Liquids
Ionic liquids
Lubricants
Friction
Nitrates
Stiction
Electrostatic force
Aluminum Oxide
Mica
Polytetrafluoroethylene
Vapor pressure
Polytetrafluoroethylenes
Silicon Dioxide
Atomic force microscopy
Energy dissipation
Alumina
Adhesion
Hydrodynamics

Cite this

Cranston, E. D., Werzer, O., Álvarez, R., Atkin, R., & Rutland, M. W. (2011). Nanotribology of protic ionic liquids: Green lubricants for micro-/nano-electromechanical devices. Abstract from 241st National Meeting and Exposition of the American-Chemical-Society, Anaheim, United States.
Cranston, Emily D. ; Werzer, Oliver ; Álvarez, Rubén ; Atkin, Rob ; Rutland, Mark W. / Nanotribology of protic ionic liquids : Green lubricants for micro-/nano-electromechanical devices. Abstract from 241st National Meeting and Exposition of the American-Chemical-Society, Anaheim, United States.
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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.",
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Cranston, ED, Werzer, O, Álvarez, R, Atkin, R & Rutland, MW 2011, 'Nanotribology of protic ionic liquids: Green lubricants for micro-/nano-electromechanical devices' 241st National Meeting and Exposition of the American-Chemical-Society, Anaheim, United States, 27/03/11 - 31/03/11, .

Nanotribology of protic ionic liquids : Green lubricants for micro-/nano-electromechanical devices. / Cranston, Emily D.; Werzer, Oliver; Álvarez, Rubén; Atkin, Rob; Rutland, Mark W.

2011. Abstract from 241st National Meeting and Exposition of the American-Chemical-Society, Anaheim, United States.

Research output: Contribution to conferenceAbstract

TY - CONF

T1 - Nanotribology of protic ionic liquids

T2 - Green lubricants for micro-/nano-electromechanical devices

AU - Cranston, Emily D.

AU - Werzer, Oliver

AU - Álvarez, Rubén

AU - Atkin, Rob

AU - Rutland, Mark W.

PY - 2011

Y1 - 2011

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=80051878835&partnerID=8YFLogxK

M3 - Abstract

ER -

Cranston ED, Werzer O, Álvarez R, Atkin R, Rutland MW. Nanotribology of protic ionic liquids: Green lubricants for micro-/nano-electromechanical devices. 2011. Abstract from 241st National Meeting and Exposition of the American-Chemical-Society, Anaheim, United States.