Figure 4

FE-SEM images of (A, B, and C) Pt@ZIF/ GCE; (D, E, and F) NHS/Pt@ZIF/GCE; (G, H, and I) Ab/EDC/NHS/Pt@ZIF/GCE; (J, K, and L) tau/Ab/EDC/NHS/Pt@ZIF/GCE.

FE-SEM images of (A, B, and C) Pt@ZIF/ GCE; (D, E, and F) NHS/Pt@ZIF/GCE; (G, H, and I) Ab/EDC/NHS/Pt@ZIF/GCE; (J, K, and L) tau/Ab/EDC/NHS/Pt@ZIF/GCE.