Fig. 3. Results for CoTPP on Au(111): The $\mathbf{\Delta }\overline{\mathbf{\nu }}$ maps in CH and CC mode are referenced to 2048.1 and 2046.9 cm⁻¹, respectively.

(A) Atomically resolved forces due to hydrogen bonding between CO and the indicated H atoms. The indicated voltages are the potential differences relative to the gold substrate, as measured by the Stark shift of CO of 19.3 cm⁻¹/V according to the calibration of Fig. 1A. (B) Electrostatic field mapped on the isosurface of local density of states (LDOS). The common image size is 27 Å × 27 Å. The set point is 0.1 nA, 1.2 V.