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CVs of the Nafion/Tyr/EGR-AuNPs-Ch/GCE in N2-saturated PBS with different scan rates (from a to n: 100, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900 and 1000 mV/s). Inset: the relationship between cathodic and anodic peak current with scan rate v.
