Fig. 4: STM and ncAFM of C2H4 associated Fe-tpy structures.
From: Small molecule binding to surface-supported single-site transition-metal reaction centres
Topographs of the C2H4 prebond (a) and C2H4 bond (d) configurations imaged at V = 20 mV and I = 10pA. Laplace-filtered ncAFM images of the C2H4 prebond (b) and C2H4 bond (e) motifs imaged at constant height with Avib = 2 Å from a setpoint of V = 20 mV and I = 10 pA on Ag(111). ∆z = −0.01 nm for (b), and ∆z = −0.022 nm for (e). Images (a, b, d, e) were all acquired with the same CO-terminated tip. Shear transformation performed on (b) to compensate for drift. Proposed chemical structures for the horizontal C2H4 prebond and vertical C2H4 bond motifs drawn in (c) and (f), respectively; note for the pre-bond structure, surface adsorption would indicate a flat-lying structure as shown, while DFT shows a weakly bonded side-orientation. Scalebars 5 Å (a, b, d, e).
