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. 2022 Mar 22;207:114209. doi: 10.1016/j.bios.2022.114209

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Fig. 2 — (A) CVs of different modified electrodes in 1.0 mM [Fe(CN)₆]^3-/4- containing 0.1 M KCl, (a) bare SPCE, (b) BNQDs/SPCE, (c) HFGNs/BNQDs/SPCE, (d) ssDNA/HFGNs/BNQDs/SPCE, (e) dsDNA/HFGNs/BNQDs/SPCE. (B) Linear curves of (a) bare SPCE, (b) BNQDs/SPCE, and (c) HFGNs/BNQDs/SPCE in 1.0 mM [Fe(CN)₆]^3-/4- containing 0.1 M KCl at different scan rates (10–200 mV s⁻¹). (C) EIS of different modified electrodes in1.0 mM [Fe(CN)₆]^3-/4- containing 0.1 M KCl, (a) bare SPCE, (b) BNQDs/SPCE, (c) HFGNs/BNQDs/SPCE, (d) ssDNA/HFGNs/BNQDs/SPCE, (e) dsDNA/HFGNs/BNQDs/SPCE. AFM images of (D) bare SPCE, (E) BNQDs/SPCE, (F) HFGNs/BNQDs/SPCE, (G) ssDNA/HFGNs/BNQDs/SPCE, and (H) dsDNA/HFGNs/BNQDs/SPCE.