Fig. 2: Self-assembly of DB-DPBA on Au(111).
From: Preferential graphitic-nitrogen formation in pyridine-extended graphene nanoribbons
a Large-scale STM topography after deposition of the molecular precursor. The molecules tend to organize in chains following the Au(111) herringbone reconstruction (scale bar: 20 nm, scanning parameters: −1 V, 50 pA). Inset: small-scale STM topography of the molecules organized in chains. The DB-DBPA are characterized by two brighter dots. b Equilibrium geometry of a single DB-DPBA obtained by DFT calculations (perspective view). The pyridyl units lay on the surface, while the bianthracene core is highly tilted. c DFT simulated STM image of a single molecule and top view of the equilibrium geometry (scale bar: 1 nm). There is good a matching with the STM appearance of molecules in the topography image in panel a.
