Constant-height I ( V ) spectra acquired on a species of 5 assigned as 5 OS , along with the corresponding d I /d V ( V ) spectra. Open feedback parameters: V = -2 V, I = 0.17 pA (negative bias side) and V = 2 V, I = 0.17 pA (positive bias side). The acquisition position of the spectra is shown in Supplementary Fig. 7 .
