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(a) MoS2 substrate incubated with a 0.5 mM pyrene–methanol solution for 5 min. (b) Cross-shaped DNA origami nanostructures deposited on MoS2 pre-treated with pyrene and immediately imaged by AFM in air. The AFM images were also recorded after 24 h (c) and 48 h (d). The observed DNA origami structure degrades over time.
