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

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(A) CV response for bare (a), GO (b), AuNPs (c), RGO (d) and GA-RGO/AuNPs (e) modified GCEs towards the detection of 100 μM DA, N₂ saturated 0.05 M PBS, and scan rate of 50 mV/s. (B) Plausible sensing mechanism of DA oxidation on GA-RGO/AuNPs.