Figure 1

Bivariate histograms of approach (left) and retract (right) portion of 50 measured force-curves in Emim⁺ Tf₂N⁻ ionic liquid on mica with increasing force set-points as 500 pN (a) 1 nN (b) 2 nN (c) 14 nN (d) and 18 nN (e) The color bar represents the common logarithm of the frequency of data points in each bin.