Figure 8
Simulation snapshots of the retraction sequences in SW and B. Note in SW the alkanethiols are nearly all aligned perpendicularly to the surface (S ~ 0.7) at z = 3.0 nm when stretched and show “spring back” morphologies at z = 3.5 and 4.0 nm. Similar behavior was not observed in the B and CaSW fluids. The orange arrows in the snapshots for SW (z = 3.0 and 3.5 nm) are the average orientations of the alkane chains before and after pull-off, and the orange oval in B (z = 3.0 nm) highlights the salt layer on the surface of the calcite.
