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. 2020 May 14;20(10):2797. doi: 10.3390/s20102797

Figure 1.

Figure 1

Scanning electron microscopy (SEM) micrographs of the screen-printed electrode surfaces (A: screen-printed electrode (SPE) and B: gold nanoparticles modified SPE (GNMSPE) accompanied with its histogram); (C) transmission electron microscopy (TEM) micrograph of Au nanoparticles; and, (D) XRD pattern of GNMSPE.