One striking trend in Table is the increase in [6]H binding energy on Cu with the number of adatoms. [6]H finds ways to interact more strongly with the increasing size of the substrate defect, demonstrating a remarkable versatility when it comes to monolayer stabilization in the presence of such defects. This stronger helicene adsorption is reflected in overall smaller binding distances on the adatom-decorated surface than on the pristine surface [Figures and]. As was the case for [6]C, the strongest deformation is seen on the two-adatom substrate, where the four rings closest to the surface are mainly flat. Binding strength is not correlated with minimum separation in these cases, however, as the one-adatom complex, which experiences the weakest binding, also displays the smallest adatom-molecule separation, as well as a weaker flattening effect than on the pristine surface. Single adatoms bind to one ring or the junction of two rings, while the remaining backbone, too far from the underlying surface to effectively interact, coils away from it. On the other hand, helicenes bind strongest to the three-and four-adatom substrates considered here. In these cases, the adatom structure is broad enough to support the basal region of the helicene, and the higher reactivity of the adatoms relative to the pristine surface leads to stronger flattening of the three rings adjacent to the adatoms, as well as stronger binding.