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. 2017 Jan 27;7:41213. doi: 10.1038/srep41213

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(A) CV response for different scan rates from 10–200 mV/s using GA-RGO/AuNPs modified electrode containing 100 μM DA in N₂ saturated 0.05 M PBS. (B) Linear plot for scan rate vs. I_pa of DA. (C) Effect of different pH solutions (3, 5, 7 and 9) using GA-RGO/AuNPs modified electrode containing 100 μM DA, N₂ saturated 0.05 M PBS, and scan rate of 50 mV/s. (D) Calibration plot for E_pa vs. pH.