Fig. 3
Properties of TBrPP-Co/AGNR/Au(111). a STM image of TBrPP-Co on AGNR (4.5 × 4.5 nm2, I t = 3 × 10−12 A, V t = 1 V). b Adsorption site of TBrPP-Co on AGNR. c dI/dV–V spectroscopy of TBrPP-Co on AGNR/Au(111) shows a flat bottom at the HOMO–LUMO gap (tip set-point: I 0 = 1.0 × 10−11 A, V 0 = 1.99 V). d High-resolution dI/dV spectra of TBrPP-Co on AGNR/Au(111) exhibit Kondo peaks with three different T K values (q = 247, 250 and 250 for 1, 2 and 3, respectively. Tip set-point: I 0 = 1.0 × 10−11 A, V 0 = 0.2 V. Spectra are vertically offset by 100 fA/mV for clarity). e T K as functions of adsorption site 1, 2 and 3 (Fig. 2d–f) for TBrPP-Co on AGNR/Au(111) (green) and on Au(111) (blue). Error bars are determined from the standard deviations of the Kondo fits. f An STM image of TBrPP-Co at the end of a molecular cluster on AGNR (4.6 × 3.3 nm2, I t = 1 × 10−11 A, V t = 0.2 V). g A sequence of dI/dV spectra taken at the locations of coloured dots labelled 1–5 in f show decreasing Kondo amplitudes as the tip moves away from the molecule centre (tip set-point: I 0 = 1.0 × 10−11 A, V 0 = 0.2 V. Spectra are vertically offset by 20 fA/mV for clarity). h The normalized Kondo amplitude (A/A max) as a function of distance r from the molecule centre show r 1 dependence. i A zoom in STM image of a TBrPP-Co molecule (2.0 × 1.9 nm2, I t = 1 × 10−11 A, V t = 0.2 V) and corresponding dI/dV Kondo map j acquired at 7 mV energy [tip set-point: I 0 = 1.0 × 10−11 A, V 0 = 0.2 V). The central part of the molecule is circled in i, which appears as a higher intensity in j
