Fig. 2From: Material priority engineered metal-polyphenol networks: mechanism and platform for multifunctionalitiesa XPS spectrum, b atomic proportion, and c molar ratio of Fe to PC in the PC-MPNI and PC-MPNII coatings. Detailed O 1Â s spectra of the d PC-MPNI and e PC-MPNII coatings. f Proportion of O in different chemical states in the PC-MPNI and PC-MPNII coatingsBack to article page