Fig. 4From: Electrochemical activity of glassy carbon electrode modified with ZnO nanoparticles prepared Via Senna Alata L. leaf extract towards antiretroviral druga CV curves of GCE/ZnO NPs at different pH values (5–9), b plot of pH versus the reduction peak current, c plot of pH versus the reduction peak potential, d CV curves of GCE/ZnO NPs at various scan rates (50–150 mV/s), e plots of v0.5 versus the reduction current (B), plots of log v versus log IBack to article page