fig1

Figure 1. (A) A TEM image of several C₂₄H₂₄FeNP-GO sheets (reaction time: 96 h) on a supporting carbon network of the TEM grid; (B) The amount of Fe atoms adsorbed on the GO nanosheets as a function of reaction time for chemical reaction of C₂₄H₂₄FeNP-GO sheets with (red open triangle) and without coupling agents (red open triangle) and AFc-GO sheets with coupling agents (blue open circle); (C) Inset: Molecular structures of the C₂₄H₂₄FeNP molecule. A TEM image of a GO nanosheet after chemical reaction of C₂₄H₂₄FeNP with coupling agents for 96 h; (D) Inset: Molecular structures of AFc molecule. A TEM image of a GO nanosheet after chemical reaction of AFc molecules with coupling agents for 24 h. Dark regions in (C and D) correspond to the nanoclusters of ferrocene derivatives; (E) Histogram of the diameter of C₂₄H₂₄FeNP-GO sheets (reaction time: 96 h). Red and blue solid lines show the Gaussian fit to the data for C₂₄H₂₄FeNP-GO and AFc-GO sheets; (F) Histogram of the number of nanoclusters in small areas of the C₂₄H₂₄FeNP-GO sheets using the quadra-count method; (G) TOF mass spectrum of C₂₄H₂₄FeNP-GO sheets. Inset: magnified spectrum at about 413 amu. TEM: Transmission electron microscope; GO: graphene oxide; AFc: amino-ferrocene; TOF: time-of-flight.