Fig. 1: Bilayer 2D COFs monitored in real-time and designable moiré superlattice formation.
From: Moiré two-dimensional covalent organic framework superlattices

a, Schematic illustration of in situ STM experiments with the use of liquid cell mounted on top of the HOPG substrate. b, Molecular precursors designed for bilayer 2D boroxine-based COFs and twisted bilayer formation with uniquely different twist angles and moiré superlattice driven by interlayer interactions.