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. 2021 Dec 27;22(1):161. doi: 10.3390/s22010161

Figure 5.

Figure 5

(A) The illustration of nanocomposites preparation steps based on aptamers, GOD, and HRP multi-labeled PtNPs-redox probes-rGS, and (B) the fabrication process of the stepwise aptasensor and differential pulse voltammogram of current response toward PDGF and thrombin (reprinted with permission from Bai et al. [91]).