Fig. 3
From: Voltammetric analysis of pholcodine on graphene-modified GNPs/PTs with green assessment
TEM images of a GNPs, b PTs, and c GNPs/PTs, d FTIR spectra of graphene powder (black line), mineral oil (red line), graphene paste (green line), polythiophene polymer (blue line), and graphene nanoplatelets mixed with polythiophene (purple line), e Nyquist plots of GNPs (blue dots) and GNPs/PTs electrode (red dots) using 5 mM K4[Fe(CN)6] in 0.1 M KCl as redox probe, and f Nyquist plots of GNPs/PTs electrode (red dots)