An ionic liquid lubricant enables superlubricity to be “switched on” in situ using an electrical potential | Zendy

Hua Li | Zendy; Ross J. Wood | Zendy; Mark W. Rutland | Zendy; Rob Atkin | Zendy

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An ionic liquid lubricant enables superlubricity to be “switched on” in situ using an electrical potential

Author(s) -

Hua Li,

Ross J. Wood,

Mark W. Rutland,

Rob Atkin

Publication year - 2014

Publication title -

chemical communications

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.837

H-Index - 333

eISSN - 1364-548X

pISSN - 1359-7345

DOI - 10.1039/c4cc00979g

Subject(s) - graphite , lubricity , lubricant , ion , materials science , ionic liquid , layer (electronics) , in situ , lubrication , boundary lubrication , ionic bonding , chemical engineering , chemical physics , composite material , chemistry , organic chemistry , catalysis , engineering

Atomic force microscopy measurements reveal that superlubricity can be "switched" on and off in situ when an ionic liquid is used to lubricate the silica-graphite interface. Applying a potential to the graphite surface changes the ion composition of the boundary layer and thus the lubricity. At positive potentials, when the interfacial ion layer is anion rich, friction falls to ultra-low levels.

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