Fig. 3: STM and nc-AFM images of 1 upon sequential annealing on Ag(100). | Nature Communications

Fig. 3: STM and nc-AFM images of 1 upon sequential annealing on Ag(100).

From: Selective activation of four quasi-equivalent C–H bonds yields N-doped graphene nanoribbons with partial corannulene motifs

Fig. 3

a–d As-deposited 1 on the Ag(100). The long axis of a 1 monomer is marked with yellow dash line. e–h After annealing at 573 K for 30 min, most 1 transformed to 2. i–l After annealing at 623 K for 30 min, most of the molecules transformed to 3. a, e, i Large scale and b, f, j zoomed in STM images. c, g, k Zoomed in and d, h, l Laplacian filtered bond-resolved nc-AFM images, corresponding chemical structures are superposed in d, h, l. The red dotted circles in the middle panels highlight the ortho C–H positions. Scanning parameters: the STM images: Vs = −30 mV, It = 40 pA; the nc-AFM images: Amplitude = 100 pm. Scale bars: a, e, i 5 nm, b–d, f–h, j–l 5 Å.

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