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500≈
500
500 Å ≈
(a)

(b)

COLOR FIGURE 14.4 One-dimensional supramolecular PVBA super-grating by self-assembly mediated by H-bond
formation on an Ag(111) surface at 300 K (measured at 77 K). (a) An STM topograph of a single domain extending
over two terraces demonstrates ordering at the micron length scale. (b) A close-up image of the self-assembled twin
chains reveals that they consist of coupled rows of PVBA molecules. (Reprinted with permission from Barth, J.V.
et al. [2000] “Building Supramolecular Nanostructures at Surfaces by Hydrogen Bonding,” Angew. Chem. Int. Ed.
39, pp. 1230–3.)

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