Extended Data Fig. 6: STM-XAS on different locations of a <tpy-Fe-tpy> bridge.
From: Characterization of just one atom using synchrotron X-rays
a, An STM image of a single supramolecular ring measured with the SX-STM setup. Image parameters: It = 100 pA, Vt = −1.0 V. b, Atomic positions of Fe and Ru ions in a. c–e, Simultaneously measured STM-XAS spectra in sample and tip channels in the tunnelling regime focusing on the L3 absorption edge of Fe. Cogent L3 edge signals of Fe ion are observed in both the sample and tip channels in c measured at the centre of the <tpy-Fe-tpy> bridge in which the Fe ion is located (position A in a). Weak Fe edge signals are observed when measured on the <tpy-Fe-tpy> bridge but the tip is not positioned on top of the Fe ion, such as in position B (d and e).
