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a The electrochemical behavior of nanopillar electrode in comparison with flat electrode and screen printed electrode using the H2SO4. b Cyclic voltammogram of NPE in the scan rate range from 10 to 50 mV/s. c Redox peak current from the (b). Reproducibility test of NPE at the 10 and 50 mV/s. The 5, 10, 15, 20, 25, and 30 cycle is presented
