Fig. 3
a UV-Vis absorption spectrum of AuNPs. b Data obtained of AuNPs in the particle size analyzer. c CV in 0.5 M H2SO4 of GC, MWCNT/GC and MWCNT-AuNPs/GC, inset: gold wire. d in equimolar aqueous solution at 10 mM Fe(CN)64−/Fe(CN)63− with 0.1 M KCl supporting electrolyte