Figure 8

Cyclic voltammograms of 2 × 10⁻⁴ M HexaFc complex from bare SPE (SPE), gold nanoparticles modified SPE (AuNPs-SPE), gold nanoparticles/silica nanospheres modified SPE (AuNPs/SiNSs-SPE), and silica nanospheres modified SPE (SiNSs-SPE) at a scan rate of 80 mVs⁻¹.