Fig. 2
From: The effect of lateral π-extension on azulene-based molecules on surface studied by LT-STM
High-resolution STM images of self-assembled CPAT nanostructures and the two chiralities on Au(111). (a) and (b) The two different chiralities, L and R. The blue arrows show the orientation of the azulene units, which have been used to assign left-handed and right-handed chiral notations. (c)–(f) Constant current STM topographies of molecules arranged in a homo-chiral manner tentatively superimposed by molecular structures, as marked by L and R. (g)–(j) Corresponding constant height CO-tip images showing the molecular geometry. Image parameters: (c) V = 0.2 V; I = 20 pA; size 2.9 × 2.9 nm2. (d) V = 0.2 V; I = 20 pA; size 4.3 × 4.3 nm2. (e) V = 0.2 V; I = 20 pA; size 8.5 × 5.7 nm2. (f) V = 0.2 V; I = 20 pA; size 7.1 × 2.9 nm2. (g)–(j) V = -5 mV; size: (g) 2.9 × 2.9 nm2, (h) 4.3 × 4.3 nm2, (i) 8.5 × 5.7 nm2, (j) 7.1 × 2.9 nm2.
