Fig. 8. DPVs recorded on HKUST-1/ITO with different modification volume of 2 mg mL⁻¹ HKUST-1 suspension from 1.5 to 9.0 μL, in 0.1 M pH 3.63 PBS solution upon 1 mM AA at the scan rate of 100 mV s⁻¹. Inset was the plot of I_pavs. modification volume.