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Set of STM images showing cove-edged GNRs grown via on-surface bottom-up reaction of monomer 5a under ultrahigh vacuum conditions. (a) Long range STM image of the oligomers after cyclodehydrogenation. I = 100pA, V = −1.20 V. (b and c) High resolution STM images of two isolated short GNRs with schematic models superimposed. (b) I = 400pA, V = −0.90 V. (c) I = 200 pA, V = −0.70 V.
