Figure 3: STM images showing the assembly of 1+2 on graphite and graphene-passivated H-C(100) diamond substrates.
From: Photoresponse of supramolecular self-assembled networks on graphene–diamond interfaces
(a) STM constant current image of 1+2 (16 μM: 10 μM) and underlying HOPG interface. Scale bar, 2 nm (b). Molecular model minimized by the MMFF force field, the hexagonal size corresponding to the theoretical unit cell is a=b=4.2 nm and the pore diameter is d=4.6 nm. Scale bar, 2 nm (c). STM large-area constant height image (12 μM:8 μM). (inset) 2D fast Fourier transform showing the high crystallinity of the assembly on HOPG. Unit cell a=(4.1±0.2) nm, b=(4.3±0.2) nm and a,b=65±2° Scale bar 20 nm (d). Gaussian-filtered STM constant current image of 1+2 on GHD. Unit cell a=(3.9±0.2) nm and b=(4.0±0.2) nm and a,b=62±2°. Area 13.8 nm2. Tunneling parameters: average tunneling current (It)=20 pA, sample voltage (Vt)=300 mV. Scale bar, 5.5 nm.
