“…8,9,10,11 Experiments on electrotunable friction with surface force apparatus (SFA) are on the way. 7,12,13 Room Temperature Ionic Liquids (RTILs) have recently attracted considerable interest as lubricants due to their unique physical properties, in particular low vapor pressure, wide electrochemical stability window and the virtually unlimited variety of RTILs and their mixtures. 14,15,16,17 The interaction of RTILs with confining surfaces induces fascinating structural and dynamical features; to list some: layering, overscreening and crowding, 16,18 a discrete multi-valued friction behavior as a function of the load and the number of the confined ionic layers ("quantized friction"), 19 nanoscale capillary freezing of RTILs confined between metallic surfaces, 20 as well as electrotunable friction.…”