NO2 gas adsorption onto 2D hybrid structure, based on the metal–organic monolayer and
gold nanoparticles (AuNPs), is demonstrated. By using Langmuir–Blodgett deposition of low‐
symmetry zinc phthalocyanine (ZnPc) molecules, the metal–organic monolayer is fabricated
with greatly suppressed intermolecular aggregation. Oxidation of the monolayer through
coordination of NO2 molecules with axial zinc ions of ZnPc molecules gives rise to the …