As molecular size increases, the structural motif evolves from chains to rings (n = 3,4) and ultimately to sheets, which dominate in the size range studied here. The prevalence of sheet structures extends well beyond our studied range, with previous computational work predicting their stability up to 18,6. The recent isolation and structural characterization of a larger 26,9 sheet demonstrates that this motif exists in higher MW MAO. The predominance of sheets allows us to focus exclusively on this structural motif, as alternative morphologies such as cages and tubes, while potentially relevant for large species, represent higher energy configurations in the low MW regime (n ≤ 8) examined here.