fig2

Figure 2. (A) A topological AFM image of C₂₄H₂₄FeNP nanoclusters on the GO nanosheet (reaction time: 96 h); (B) A cross-sectional line profile of the nanocluster marked with yellow triangle in (A); (C) Histogram of the heights of C₂₄H₂₄FeNP nanoclusters on the GO nanosheets (reaction time: 96 h). Red and blue solid lines show the Gaussian distribution fitted to the data for the C₂₄H₂₄FeNP-GO and AFc-GO sheets; (D) Schematic sequential illustration of the on-surface chemical reaction in which the molecule covalently bonded to the GO nanosheet acts as a nucleus for crystal growth. AFM: Atomic force microscope; GO: graphene oxide; AFc: amino-ferrocene.