Matters Arising: Weak (if at All) Experimental Evidence for Structure Model and Superior Performance Claims of a 2D Polyaniline

Arising from Zhang et al. Nature https://doi.org/10.1038/s41586-024-08387-9 The authors present a multi-layer-stacked crystalline 2D Polyaniline (PAni) structure with metallic out-of-plane electrical conductivity.[1] They claim this out-of-plane metallic conductivity (15 S/cm) to be the highest conductivity of this type ever published. The PAni structure presented would in fact be unique and a new structure principle for conductive polymers as their model involves single chains as network strings in a 2D layer. While this publication offers some interesting prospects, there are too many unsupported statements, hence having found a new principle may be least premature.