Figure 1: Experimental data acquisition protocol.
From: Visualizing the orientational dependence of an intermolecular potential
(a) cartoon showing the method of data acquisition for 3D potential mapping—a single C60 molecule is attached to the tip of the scanning probe microscope and brought close to a group of surface-adsorbed molecules. Constant height scans are acquired at decreasing tip-sample separation, with active drift compensation between each scan, and the variation in the frequency shift Δf measured. (b–f) representative Δf images (in Hz) at decreasing tip-sample height. Tip-sample heights shown for each image are given relative to the Δf set point used for atom-tracking over the molecule. The slightly different z heights for the two data sets result from the slightly different tracking heights used in each case. Image sizes: 3.5 × 2.2 nm2 and 2.5 × 2.5 nm2.
