Fig. 4: Dynamic ‘scratching’ experiment revealing the registry of bilayer COFs.
From: Moiré two-dimensional covalent organic framework superlattices
a, Schematic illustration of STM tip-assisted scratching and healing processes. b,c, STM image of phase B revealing the moiré pattern (b) and FFT pattern (c). d,e, STM image of the same domain (d), revealing the molecular arrangement of the underneath layer after the removal of the top layer, and the corresponding FFT image (e). White circles outline the 2 nm period of COF-1. Imaging conditions: Vs = 0.3 V, It = 0.08 nA (b, d). Scratching condition: Vs = 0.01 V, It = 0.8 nA. Scale bars are provided in each image.
