Recent Progress in the Fabrication of Low Dimensional Nanostructures via Surface-Assisted Transforming and Coupling

Figure 10

(a) Monomer with an additional dimethyl-biphenyl group in the interior of the U-shape to afford a 6-ZGNR upon polymerization (Step1) and subsequent cyclization (Step2). STM image of the Au (111) surface after annealing at 625 K indicates the complete cyclodehydrogenation of the polymers and the formation of 6-ZGNRs. (b) The scheme of Ullmann coupling with the monomers DMTP performed on the interesting template Cu(110)-(2 × 1)O nanotemplate is expressed, and the STM images (c–f) show the magnified view of organometallic species formed on the sample in panel depending on different reaction pathways tuned by the different widths of bare Cu stripes on a Cu(110)-(2 × 1)O surface. The corresponding molecular models are shown in (g–j). Images are taken from [16] with permission.