Figure 35.

Friction forces and velocity profiles of RTILs under nanoconfinement. (a) Friction force of [C₆MIM] [BF₄] confined between negatively charged surfaces, as a function of the surface charge and normal load. (b) Velocity profiles of the same ionic liquid (as in (a)) as a function of surface charge and load. (a,b) Reproduced with permission from ref (233). Copyright 2020 American Chemical Society. (c) Friction force of [BMIM][ PF₆] (pure and diluted at 0.1:0.9 molar fraction) as a function of surface charge, and a load of ∼500 MPa. Reproduced with permission from ref (386). Copyright 2020 American Chemical Society.