Colloid solutions of Ag-NS and Ag-NPr nanoparticles were characterized by using a Gemini scanning electron microscope from ZEISSĀ® (Jena, Germany). Ag-NP samples were prepared as in a previous work [28 (link)]. In addition, the surface of the SPCNFE electrodes was also studied by the scanning electron microscope before and after the Ag-NP deposition. This aimed to determine the presence of NPs, as well as their spatial distribution on the SPCNFE with regard to the modification strategy: drop-casting, spin-coating, or in situ.
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