Fig. 3: Different annealing temperatures of DB-DBPA on Au(111).
From: Preferential graphitic-nitrogen formation in pyridine-extended graphene nanoribbons
a Large-scale STM topography after annealing at 180 °C. In the inset, a zoom-in image of a segment of a polymer with alternating dots with a period of 0.85 nm (scale bar: 5 nm, scanning parameters: −0.5 V, 30 pA). b Large-scale STM of partially planar segments after annealing at 250 °C. In the inset, a zoom-in image of partially planar segments (scale bar: 10 nm, scanning parameters: −0.5 V, 20 pA. At this temperature, some edges have already undergone planarization. In general, this process starts at the GNR end and proceeds along one edge. c Large-scale STM image of planar GNRs at 300 °C. In the inset, a zoom-in image of a segment of a ribbon (scale bar: 10 nm, scanning parameters: −0.3 V, 40 pA.) At this temperature, the segments are already completely planar.
