Figure 3
(a) STM images of the self-assembled structures of the monomer DPIA at TCB/HOPG interface.Iset = 300 pA, Vbias = 600 mV. (b) A suggested molecular model corresponding to the observed structure in (a), the unit cell parameters are: a1 = 2.0 ± 0.1 nm, b1 = 4.0 ± 0.1 nm and α1 = (78 ± 1)°. (c) STM images of the self-assembled structures after treatment of the DPIA-covered HOPG surface. Iset = 300 pA, Vbias = 625 mV. (d) A tentative molecular model for the observed structure in (c), the unit cell parameters are: ac = 2.3 ± 0.1 nm, bc = 4.2 ± 0.1 nm and αc = (71 ± 2)°.
