Fig. 6
From: Selective on-surface covalent coupling based on metal-organic coordination template
SPy-p-Ph nanoribbons formed after annealing at 578-705 K. a STM overview of a sample annealed at 705 K. b Close-up inspection of the nanoribbons. The measured periodicity of the chain is 1.75 ± 0.05 nm. Labels I, II and III denote the three modes for the SPy macrocycles. c High-resolution STM image (left), DFT-optimized structure (middle) and the simulated STM topograph (right, U = −0.5 V) of the I-mode SPy. d, e High-resolution STM images of the II and III-mode. f The dependence of the abundance of I, II and III-mode SPy units on the annealing temperatures (650 K, 673 K and 705 K). Scale bars: (a) 10 nm; (b) 3 nm. Data acquisition conditions: (a) −0.8 V, 0.2 nA, 105 K; (b, c and e) −0.5 V, 0.2 nA, 133 K; (d) −1.5 V, 0.3 nA, 293 K
